The government can scrutinise and intervene in certain acquisitions that could harm the UK’s national security. They can impose certain conditions on an acquisition and in rare cases may unwind or block an acquisition completely.

The rules apply to acquisitions that are in progress or contemplation. Acquisitions completed before 12 November 2020 are exempt.

If you are planning an acquisition of a qualifying entity in one of 17 defined sensitive areas of the UK economy, you may need to get approval from the government before you can complete it. This is called a notifiable acquisition. Completing a notifiable acquisition without approval will mean the acquisition is void and may mean that the acquirer is subject to civil or criminal penalties.

This guidance tells you:

• what types of acquisitions are covered
• when you need to tell the government about an acquisition
• how the government will scrutinise the acquisition

These rules fall under the National Security and Investment (NSI act), which came into force on 4 January 2022. The Act is administered by the Investment Security Unit (ISU) in Cabinet Office and the decision maker is the Chancellor of the Duchy of Lancaster, the Secretary of State in the Cabinet Office.

How the rules work

1. Check if the rules apply to your acquisition. This will depend on what you are acquiring and how much control you have over it.

2. Check if you need to tell the government about your acquisition. You are legally required to inform the government about certain acquisitions of entities if your acquisition is in a sensitive area of the UK economy.

3. Tell the government about your acquisition. You can do this online by submitting a notification using the National Security and Investment service.

4. The government will review your acquisition. It can either clear your acquisition, impose certain conditions, or block or unwind it.

Check if the rules apply to your acquisition

These rules only apply to qualifying acquisitions. These are referred to as “trigger events” in the National Security and Investment Act.

Your acquisition is a qualifying acquisition if all of the following apply:

• the acquisition is of a right or interest in, or in relation to, a qualifying asset or qualifying entity (these terms are explained below)
• the entity or asset you are acquiring is from, in, or has a connection to the UK
• the level of control you acquire over the qualifying entity or qualifying asset meets or passes a certain threshold (for example, your stake or voting rights in a qualifying entity becomes higher than 25%)
• the acquisition was not completed before 12 November 2020

If the government reasonably suspects that an acquisition meets these criteria and that it has given rise to, or may give rise to, a risk to national security, it can be scrutinised by the government.

In addition, if this qualifying acquisition is of an entity in one of the 17 defined sensitive areas of the economy it may need to be notified to the government. Qualifying acquisitions outside the 17 defined areas do not need to be notified to the government.

Check if you are acquiring a qualifying entity or asset

A qualifying entity is any entity other than an individual, including:

• a company
• a limited liability partnership
• any other body corporate
• a partnership
• an unincorporated association
• a trust

Qualifying assets include:

• land
• tangible moveable property
• ideas, information or techniques which have industrial, commercial or other economic value (‘intellectual property’)

Entities and assets might be qualifying entities and qualifying assets if they are outside or not from the UK but have a connection to the UK.

Acquisitions of entities or assets outside or not from the UK

If an entity is formed or recognised under the law of a country or territory outside the UK, it is a qualifying entity if it either:

• carries on activities in the UK or
• supplies goods or services to people in the UK

For land or tangible moveable property situated outside the UK or its territorial sea, or for any intellectual property, it is a qualifying asset if it is either:

• used in connection with activities carried on in the UK or
• used in connection with the supply of goods or services to people in the UK

Read further guidance on how the rules work for entities and assets outside or not from the UK.

Check the level of control you have acquired, or will acquire, over the qualifying entity or asset

If you are acquiring a qualifying entity or asset that is from, in, or has a connection to the UK, you will need to check if the level of control you have acquired, or will acquire, over it could bring it in scope of the rules.

Your acquisition is in scope of the rules if you acquire a right or interest in, or in relation to, a qualifying entity or asset, and the level of control you acquire meets any of the following thresholds:

• your shareholding stake or voting rights in a qualifying entity meets or crosses certain percentage thresholds (for example, it becomes higher than 25%)
• you acquire voting rights in a qualifying entity that allows you to pass or block resolutions governing the affairs of the entity
• you are able to materially influence the policy of a qualifying entity, for example acquiring the right to appoint members of the board of the entity that enables you to influence the strategic direction of the entity
• you are able to use a qualifying asset, or direct or control its use, or you are able to do so more than you could prior to the acquisition

If your qualifying acquisition takes place over more than one day, the acquisition will be treated as having taken place on the last day of the period.

Further details of each threshold are outlined below.

If your shareholding stake or voting rights meet or cross certain percentage thresholds

Your acquisition is in scope if your shareholding stake or voting rights increase:

• from 25% or less to more than 25%
• from 50% or less to more than 50%
• from less than 75% to 75% or more

If the entity has a share capital, the thresholds describe holding shares comprised in the issued share capital of a nominal value (in aggregate) of that percentage of the share capital.

If the entity does not have a share capital, the thresholds describe holding a right to that percentage share of the capital or profits of the entity.

If the entity is a limited liability partnership, the thresholds describe holding a right to that percentage share of any surplus assets of the partnership on its winding up. Where this is not expressly provided for, each member will be treated as having an equal share.

If you acquire voting rights that allow you to pass or block resolutions governing the affairs of the entity

Such an acquisition is in scope of the rules, regardless of the percentage of voting rights you may already hold, or the percentage of your shareholding, or taking into account other voting rights you hold as well as your acquisition. Any voting rights you already held before the acquisition are taken into account when assessing whether the acquisition meets this threshold.

Voting rights means rights that are given to shareholders or members to vote at general meetings on all, or substantially all, matters.

If the entity does not have general meetings at which matters are decided by such votes, voting rights includes any rights in relation to the entity that are of the equivalent effect.

In the case of minority veto rights, the voting rights only count where they provide the holder with a right to vote on all or substantially all matters governing the affairs of the entity.

“Governing the affairs of the entity” covers a wide range of actions. The government considers that since acquisitions of control may give rise to risks to national security through a variety of types of voting rights, no particular rights are excluded from constituting such a trigger event. The risk arising from control will be assessed alongside the risks arising from the nature of the target and the characteristics of the acquirer, however a higher level of control may increase the level of national security risk. See the “Section 3 Statement” for further information on the risk factors the Secretary of State will consider when deciding whether to exercise the call-in power.

If you acquire a right or interest in, or in relation to, a qualifying entity which provides you with ‘material influence’ over the entity’s policy

The Competition and Markets Authority (CMA) has produced guidance on its assessment of material influence when operating the merger control regime under the Enterprise Act 2002.

When making its assessment, the CMA focuses on the acquirer’s ability materially to influence policy relevant to the behaviour of the target entity in the marketplace. The policy of the target in this context means the management of its business, and thus includes the strategic direction of a company and its ability to define and achieve its commercial objectives. Any assessment by the government of an acquisition of material influence under the NSI Act will be considered in the light of the relevant section on material influence in the CMA guidance but applying the concept in the context of the NSI Act, so far as is appropriate.

The material influence threshold in the NSI Act does not apply if:

• you are acquiring an asset
• you already hold a right or interest enabling you to materially influence the policy of the entity

If you acquire a right or interest in, or in relation to, a qualifying asset and as a result you are able to use, or to direct or control how the asset is used, or can do so to a greater extent than before the acquisition

This could include acquiring a right or interest that gives you the ability to use, or to direct or control the use of an asset, even if you do not acquire the asset itself.

Qualifying assets include land, tangible moveable property and intellectual property, and these may be within or outside the UK. If an asset is outside the UK, or is intellectual property, it must have a sufficient connection to the UK. Read further guidance on how the rules work for entities and assets outside or not from the UK.

Internal corporate reorganisations

Entities carry out internal reorganisations for a range of reasons, including seeking to simplify the corporate structure, reduce compliance costs and reporting complexity, preparing part of a group for sale, and overall business rationalisation.

The government considers that internal reorganisations can be qualifying acquisitions where they result in an acquisition of control over a qualifying entity (as defined in Section 8 of the NSI Act), even if the ultimate beneficial owner of the entity remains the same.

Additionally, the acquisition may be subject to mandatory notification if it meets the relevant tests in the NSI Act.

The government recognises that most acquisitions of this kind will simply be a product of internal corporate restructuring and efficiency.

There may be rare cases where the acquisition of control over an entity by a person in the same business group raises national security risks. That may be true even if the ultimate beneficial owner is the same before and after the qualifying acquisition.

This is because an acquisition of control by another “link” in the corporate structure – particularly one where the ultimate beneficial owner is passive – could enable a hostile actor to pursue malign actions over the entity.

This diagram is an example of an internal reorganisation:

In this example the internal reorganisation involves the transfer of MidCo B’s 100% shareholding and voting rights in Company D to MidCo C.

While the ultimate beneficial owner, TopCo A is the same before and after the internal reorganisation – and their level of their indirect holding in Company D remains unchanged – this does not negate that MidCo C is acquiring control over Company D. This therefore constitutes a qualifying acquisition.

If Company D carries on activities in the UK that are specified in Notifiable Acquisition Regulations, this also requires mandatory notification. MidCo C must therefore notify the government of the proposed acquisition and receive clearance before it can take place.

Acquisitions involving parties who are suffering material financial distress

While the government aims to conduct all assessments in as timely a manner as possible, it is important that the government is able to assess properly the potential risks of a given acquisition, including gathering all relevant information. As a result, it is only possible to expedite the timelines set out in the NSI Act in exceptional circumstances.

In some circumstances, an acquisition may require a mandatory notification, or be subject to a call-in or review under the NSI Act, at a time when the parties face financial distress that means they would like a faster decision from the government.

In these circumstances, relevant parties should bring this to the government’s attention as soon as possible and provide supporting evidence, especially where the statutory timelines of the NSI Act could exacerbate financial problems.

In exceptional circumstances, it may be possible to expedite the government’s decision on whether or not to call in an acquisition. The scope to expedite later stages of the process during the “assessment period”, after an acquisition has been called in, is more limited, as a call-in means that the Secretary of State has already established that there is reasonable suspicion that the transaction has given rise to or may give rise to a risk to national security. If the material financial distress faced by an entity has a direct bearing on the national security risks involved, this may be relevant.

Even in a situation where an expedited timeline may be appropriate, any notifiable acquisition that proceeds without the government’s approval is void. A party that completes an acquisition without government approval may face criminal or civil penalties under the NSI Act.

Relevant evidence of financial distress

The government will consider all representations made by the relevant parties when taking decisions under the NSI Act. Where material financial distress is claimed, subject to privilege and proportionality considerations, the government will typically request analysis provided to the company by external legal, restructuring and insolvency advisers, as well as external auditors, in relation to the position of the company. The government may also request evidence from the company’s debt or equity providers, such as banks that provide its financial facilities or existing shareholders.

If the entity in question is part of a larger corporate group, the government will also consider the parent company’s ability to provide continued financial support.

If relevant, parties can also provide evidence that funding options other than a sale or merger are not feasible or available.

The government will consider what evidence is appropriate to be provided on a case-by-case basis. Relevant evidence of urgent financial distress is likely to include, but is not limited to:

• Restructuring and insolvency advisor confirmation of engagement, along with their analysis and advice to the company supporting the claim that an insolvency event is imminent;
• 13-week cash flow statement, clearly showing a deficit and breach of facilities;
• Current balance sheet and profit and loss account, including projections;
• Evidence of non-support from lenders and shareholders, including evidence of breaching banking facilities; and/or
• Correspondence with suppliers/creditors of the company evidencing debt demands (and therefore non-support).

The appointment of liquidators or other insolvency measures

The appointment of liquidators and receivers may constitute a qualifying acquisition under the NSI Act and, in some specific scenarios, may require mandatory notification.

Schedule 1 to the NSI Act does not treat rights that are exercisable by an administrator or by creditors while an entity is in relevant insolvency proceedings as being held by the administrator or creditors. This approach does not, however, include rights held by liquidators or receivers, who may oversee the winding up of an entity or the enforcement of secured assets – an action that could, in certain situations, raise national security risks.

This means the appointment of a liquidator or receiver may be a qualifying acquisition, and in specific cases may require mandatory notification. This will depend on whether and how the circumstances of the appointment meet the requirements of the NSI Act.

There are 2 scenarios, set out below, where the appointment of a liquidator or a receiver may result in them holding a right or interest in another entity. Their appointment may then require mandatory notification if the notifiable acquisition criteria are met.

When these scenarios occur and parties need to submit a mandatory notification, such notifications are subject to the same timelines as other notifications.

Indirect acquisitions of control

Under the NSI Act, it is possible for investors and other parties to acquire control over qualifying entities indirectly. This happens when there is an unbroken chain of majority stakes down to an entity of interest.

Schedule 1 in the NSI Act defines 4 types of majority stakes:

a) Company A holds a majority of voting rights in Company B; or
b) Company A is a member of Company B and has the right to appoint or remove a majority of the board of directors of B; or
c) Company A is a member of Company B and controls alone, pursuant to an agreement with other shareholders or members, a majority of the voting rights in Company B; or
d) Company A has the right to exercise, or actually exercises, dominant influence or control over Company B.

The granting of security over shares

The granting of share security occurs where a person who owns shares in a qualifying entity (the borrower) grants security over those shares in favour of another person (the lender or a security trustee on behalf of a number of lenders). It is typical for the lender and borrower to agree that if a certain event takes place (for example, a default on the loan), the lender or security trustee will be able to enforce the share security and gain control over the share, allowing them to exercise voting rights in respect of the shares. The granting of share security is separate from the enforcement of that share security, which may or may not occur at a further point in time.

The granting of types of share security where title to the shares is not transferred to the secured lender (or its nominee) is not a notifiable acquisition requiring mandatory notification, even if it involves an entity carrying on activities covered in the Notifiable Acquisition Regulations.

The NSI Act concerns relevant acquisitions of control. Sections 8(2), 8(5), and 8(6) set out some of the ways that an acquirer might acquire control over an entity. If an acquirer gains control, under those sections, over an entity carrying on particularly sensitive activities set out in the Notifiable Acquisition Regulations, that will require mandatory notification and clearance before the acquisition can be completed. These sections set out the following ways to gain control:

• the acquirer’s shareholding stake or voting rights in a qualifying entity meets or crosses certain percentage thresholds – for example, it becomes higher than 25%
• the acquirer acquires voting rights in a qualifying entity that allows them to pass or block resolutions governing the affairs of the entity.

However, the granting of such share security does not constitute any of these types of acquisitions of control.

Whilst the grant of a security over shares could create an equitable interest in such shares, such an interest would not appear to grant any control over the shares, as referred to in section 8(1) of the NSI Act, until the happening of an event that would provide control.

Section 8(2) of the NSI Act should be read in conjunction with section 8(1) and (3) of the NSI Act. Section 8(1) provides that a person gains control of a qualifying entity if the person acquires a right or interest in, or in relation to, the entity and as a result one of the cases of control set out in section 8 arises.

The case set out in section 8(2) relates to an increase in the shareholding of the person and section 8(3) expands on the reference to “holding a percentage share” in section 8(2). The holding of shares in this context is a reference to having shares in a company. Whilst the grant of a security over shares could create an equitable interest in such shares, such an interest would not appear to grant any control over such shares, as referred to in section 8(1), unless or until an event that would provide control happens. The creation of a share pledge over shares in a qualifying entity of a specified description under Scots law, where title to the shares is transferred to the secured lender or its nominee, would require prior notification and clearance from the government.

Similarly, the case set out in section 8(5) relates to an increase in voting rights that the person holds in the entity. Such an increase in voting rights would also not appear until the event that would provide control happens.

This means it is not mandatory to notify and receive clearance from the government before granting equitable share security.

Notwithstanding the above, if legal title is transferred or control passes in some other way, and the shares qualify under the Notifiable Acquisition Regulations, a notifiable acquisition has taken place and must be notified to the government before completion.

Different types of voting rights and mandatory notification

The NSI Act concerns acquisitions of control over qualifying entities and qualifying assets. In respect of entities, Section 8(6) means that the NSI Act applies to acquisitions of voting rights that enable a person to secure or prevent the passage of any class of resolution governing the affairs of the target entity.

Whilst the thresholds specified in sections 8(2) and 8(5) (i.e. over 25%, over 50% and 75% or more of shareholding or voting rights) have strong relevance in UK company law, companies can still set alternative thresholds, and entities that are not companies have greater flexibility to set alternative thresholds for passing or blocking resolutions (or their equivalent). Section 8(6) applies to these circumstances.

There are circumstances where parties have contractual rights that may have the effect of securing or preventing the passage of a class of resolution. These are frequently taken by minority investors when providing early-stage investment and may occur in other circumstances too.

The government considers that such contractual rights are not covered by the NSI Act under section 8(6) on the basis that such contractual rights are not themselves voting rights as set out in section 8(7), provided such contractual rights do not amount to control of such voting rights under paragraph 5 of Schedule 1.

In addition, such contractual voting rights would need to enable the acquirer to secure or prevent the passage of all resolutions of a particular class to be relevant for the purposes of section 8(6).

Notwithstanding the above, the government recognises that the breadth of matters which might be subject to investor consent is extensive. While minority investors may typically seek strong protections – particularly in the case of early-stage investment – the government is also mindful of those seeking to exert malign influence over sensitive businesses through the use of contractual rights.

That is partly why the NSI Act also defines control in section 8(8) as an acquisition which enables a person materially to influence the policy of the entity.

It may be, depending on the facts of the case, that contractual rights – either alone or together with other interests or rights – give an acquirer material influence.

Unlike voting rights in section 8(6), an acquisition of material influence is not subject to mandatory notification. However, the parties may submit a voluntary notification. Whether a notification is submitted or not, the government may call in qualifying acquisitions where they reasonably suspect the acquisition may give rise to a risk to national security.

If you are planning a qualifying acquisition but it has not yet taken place

The government can assess a potential qualifying acquisition that has not yet happened if it reasonably suspects it may cause a national security risk. The government can call in a qualifying acquisition that has already happened or is in progress or contemplation.

Interests and rights

Interests and rights count as acquired if you begin to hold them in any of the following ways:

• hold an interest or right jointly with someone else
• have a joint arrangement with someone else that means you will exercise all, or substantially all, of the rights or interests in a way pre-determined by the arrangement. The NSI Act has a broad definition of ‘arrangement’ which means most types of arrangement count under these rules
• hold a majority stake in an entity that holds the interest or right, or is part of a chain of entities which each hold majority stakes through the chain and the last one holds the interest or right
• a nominee holds an interest for you
• control a right that is owned by another party (unless the owner also controls the right)
• hold a right exercisable only under certain circumstances, when the circumstances have arisen or you control whether those circumstances exist. This does not apply to administrators or creditors, who are not regarded as holding those rights while an entity is in relevant insolvency proceedings in certain circumstances, hold a right attached to shares which are held as security by a lender. The owner, not the lender, is treated as owning or acquiring the rights where the rights are exercisable only in accordance with the owner’s instructions (apart from exercising the rights for the purpose of preserving the value of the security, or of realising the value). It is also the case where the shares are held in connection with loans as part of normal business activities and the rights are exercisable only in the owner’s interest (apart from exercising the rights for the purpose of preserving the value of the security, or of realising it)
• hold combined rights or interests with another person by virtue of being connected (for example, a spouse or relative or 2 or more undertakings in one group)
• hold rights or interests with another person or more people, with whom you share a common purpose (for example, coordinating influence on an entity’s activities)

Check Schedule 1 of the NSI Act for full details. This includes some specific limitations of what is considered as acquired such as whether an acquisition has taken place when shares are given as security for a loan.

Check if you need to tell the government about your acquisition

You are legally required to tell the government about certain acquisitions of qualifying entities in 17 sensitive areas of the economy subject to certain criteria. These are mandatory notification requirements, known as ‘notifiable acquisitions.’

You must get approval from the government before you complete the acquisition otherwise the acquisition will be void. You can do this by submitting an online form to the government (called a ‘mandatory notification form’).

The government will then review your acquisition to see if it could cause a national security risk. If the government clears the acquisition, it cannot assess it again, unless false or misleading information was submitted.

When you will be legally required to tell the government about your acquisition (mandatory notification)

If you are a party acquiring a qualifying entity that operates in one of 17 sensitive areas of the economy, you may need to tell the government and get approval before you can complete your acquisition. These are called ‘mandatory notification’ requirements and cover areas which are considered more likely to give rise to national security risks.

The 17 areas of the economy are:

• Advanced Materials
• Advanced Robotics
• Artificial Intelligence
• Civil Nuclear
• Communications
• Computing Hardware
• Critical Suppliers to Government
• Cryptographic Authentication
• Data Infrastructure
• Defence
• Energy
• Military and Dual-Use
• Quantum Technologies
• Satellite and Space Technologies
• Suppliers to the Emergency Services
• Synthetic Biology
• Transport

You need to tell the government about a notifiable acquisition by submitting a mandatory notification online. Qualifying acquisitions which are subject to mandatory notification requirements are called ‘notifiable acquisitions’.

If you are notifying, you will be asked to provide information on the structure and share ownership of the qualifying entity, the acquirer and the acquisition.

Mandatory notification requirements only apply to the acquisition of qualifying entities. These requirements do not apply to the acquisition of qualifying assets.

Your acquisition is a ‘notifiable acquisition’ if it meets the following criteria:

1. You are acquiring a qualifying entity that carries out certain activities in the UK within one of 17 sensitive areas of the economy.

2. And any of the following apply:

i) Your shareholding stake or voting rights increase:

• from 25% or less to more than 25%
• from 50% or less to more than 50%
• from less than 75% to 75% or more

ii) Your acquisition is of voting rights and this will enable you to secure or prevent the passage of any class of resolution governing the affairs of the entity.

Read further guidance about the activities of qualifying entities in the 17 areas of the economy that are subject to mandatory notification and what to do if you have significant uncertainty about whether an acquisition is notifiable.

A notifiable acquisition can only be notified using the mandatory notification form. If you do submit a notification using the wrong form, the NSI Act requires the government to reject the notification. In that circumstance, the government will contact you as soon as reasonably practicable. This is to explain why it has been rejected and advise you on the possible next steps.

Check if your acquisition is a notifiable acquisition when the entity is outside the UK

For notifiable acquisitions, a qualifying entity falls within the scope of mandatory notification requirements only if it carries out the activity specified in the regulations in the UK.

If a qualifying entity is formed or recognised under the law of a country or territory outside the UK and carries on activities in the UK which are specified in the Notifiable Acquisition Regulations then the acquisition of such an entity may be a notifiable acquisition.

If you do not tell the government about a notifiable acquisition

The acquisition is void if you complete a notifiable acquisition without notifying and gaining approval from the government. You will be able to apply for retrospective validation online.

If you have an acquisition that is not covered by mandatory notification

You are not legally required to tell the government about your qualifying acquisition if it is not covered by a mandatory notification. You can submit a voluntary notification if you are a party to a completed or planned qualifying acquisition that is not covered by mandatory notification and want to find out if the government is going to call it in.

Even if you do not notify an acquisition, if the government reasonably suspects it may give rise to a national security risk it may still be called in for a national security assessment. The government can assess acquisitions up to 5 years after they have taken place and up to 6 months after becoming aware of them if they have not been notified.

When to notify

You will need to consider when it is appropriate to notify a qualifying acquisition.

Notifications should generally be made at the point at which the terms of the acquisition are sufficiently stable to enable the government to properly assess whether the NSI Act is applicable and whether it could lead to national security risks.

The government would generally consider it appropriate to notify when there is a good faith intention to proceed. This might be evidenced by:

• the existence of heads of terms;
• financing arrangements being in place;
• board level consideration of the acquisition; or
• if it is a public bid, a public announcement of a firm intention to make an offer or the announcement of a possible offer.

However, the government may accept a notification where the items above are not present where there are good reasons for doing so.

If an acquisition is notified too early in the process and subsequently changes after it has been reviewed, the updated acquisition might count as a separate trigger event. Any clearance given to the original notification may not apply to the new trigger event.

Parties may contact the government if they consider there to be non-material changes to the planned arrangements, to ask if a new notification is needed. Dealing with such requests may take time, and parties should allow sufficient time in their commercial timeline in case another notification is necessary.

The premature notification of acquisitions can have negative consequences for notifying firms (and related parties):

• It may necessitate further information requests in relation to the acquisition, which can cause delay;

• The notification may ultimately be rejected (meaning that another notification might be required at a later stage). The government may reject a notification if:

• it does not meet the requirements of the NSI Act;
  • it does not meet the requirements prescribed by the regulations; or
  • it does not contain sufficient information to allow the Government to decide whether to give a call-in notice.

If you decide to notify, the notification form should state the progress of negotiations or commercial dealings, including the awareness of the seller and target. Depending on the circumstances, and the details provided in the notification, before accepting a notification the government may require confirmation that a counterparty to the acquisition (for example the seller) has been engaged and agrees that the acquisition is in contemplation, as this helps to rule out disputes as to jurisdiction.

This may be particularly important, for example, in the event that the government has received more than one notification in relation to the same target, where the arrangements appear to be fluid, or where there are unusual circumstances surrounding the notification.

The government will not typically provide any information regarding the potential existence or identity of any alternative bidders.

In any case where the target is not involved in the notifications process, notifiers should be aware that the government is legally required to notify the target (distinct from the seller) if the acquisition is called in for scrutiny.

Submitting a notification form

There are 3 different forms that can be used to notify the government about an acquisition:

• mandatory notification form: as explained above, you are legally required to tell the government about notifiable acquisitions in 17 sensitive areas of the economy
• voluntary notification form: as explained above, you can submit a voluntary notification if you are a party to a completed or planned qualifying acquisition that is not covered by mandatory notification
• retrospective validation application form: as explained above, an acquisition is void if you complete a notifiable acquisition (which is subject to mandatory notification) without notifying and gaining approval from the government. You can apply for retrospective validation if you have completed a notifiable acquisition without notifying

You can submit a notification form using the National Security and Investment notification service.

Submit a notification form.

There is further guidance on how to register for the online notification form service and complete notification forms.

How long the NSI process will take

The government works within statutory deadlines to complete each stage of screening under the NSI Act. Details of each stage are set out below in the section “After you’ve submitted a notification form.”

The total length of the screening process under the Act involves up to three periods: accepting/rejecting a notification; the review period; and the assessment period. These periods are explained below. Throughout the screening process, the Act’s statutory count of working days excludes weekends and any public holidays which occur in any of the four nations of the UK.

After the government receives a notification

Once a notification regarding an acquisition is submitted, the government must decide whether to reject or accept the notification as soon as reasonably practicable. The Government aims to do this in 5 working days. In some cases, this may take longer, particularly if an acquisition or specific issue is complicated.

Review Period

The review period begins on the day that a notification is accepted and can last up to 30 working days. It ends on the day that the government’s decision to call in or clear the acquisition is communicated to the acquirer.

Assessment Period

The assessment period begins on the day on which the acquirer is notified that the acquisition has been called in. It ends on the day that the government’s decision to give a final notification or make a final order is communicated to the acquirer. 

The assessment period begins with an ‘initial period’ of 30 working days. If the government believes further time is required to assess the acquisition, the assessment period can be extended by an additional 45 working days. The period can then be extended further voluntarily with written agreement from the acquirer. 

During the assessment period the statutory count of working days also excludes the time during which an information notice or attendance notice is in place. The day that an information notice or attendance notice is issued, and the day that the government confirms the notice has been complied with, and all days in between are not counted towards the length of the assessment period. In cases where information or attendance notices are issued, the initial and additional assessment periods will therefore last longer than 30 and 45 days respectively. This is not the case in the review period where information and attendance notices do not affect the statutory count of working days.

After you’ve submitted a notification form

Accepting or rejecting a notification form

When a notification has been submitted to the government for review, the government will give you a case reference number and aims to accept, reject, or return the notification to the notifier within a reasonable timeframe. The government aims to do this in 5 working days. In some cases, this may take longer, particularly if an acquisition or specific issue is complicated.

Where the government refers a notification back to a notifier, any questions should be answered as quickly as possible to enable the government to decide whether to accept or reject the notification. If notifiers have questions, they can contact the government at investment.screening@cabinetoffice.gov.uk

The government may ask you to resubmit a notification form if more information is needed before it can be accepted.

The government will email you telling you whether your notification form has been accepted. The 30 working day period for the government’s review begins on the day this email is sent.

A notification form that is rejected will not progress to the next stage and will be returned with the reasons why it was not accepted. This applies to all types of notification form, whether mandatory, voluntary or retrospective.

Once a notification form has been accepted

The consideration of notifications is divided into 2 parts:

• the review period (applies to all notified acquisitions)
• the assessment period (applies only if an acquisition is ‘called in’)

The processes for review and, if required, assessment are the same for each type of notification, whether mandatory, voluntary or retrospective.

Review period

After a notification has been accepted, the government will review the acquisition in more detail in order to support the decision on whether to call it in for assessment (the “review period”). This involves conducting significant due diligence and sharing the details of the acquisition with relevant other government departments. For example, defence-related cases are shared with the Ministry of Defence for assessment. Once relevant departments have provided their assessments, and any further information has been received from the relevant parties, the government will make a final decision.

While the government remains open to communication with companies throughout the process it is not unusual for the government to have sufficient information during the review period to decide whether to call the acquisition in or not. Parties may be contacted during the review period if further information is needed.

Within 30 working days of acceptance of the notification form

The government will either:

• clear the acquisition and tell you it can go ahead
• call in the acquisition for a full national security assessment
• require further information, which you should provide as soon as possible, to help complete the assessment (known as an ‘information notice’)
• require you or people involved in the acquisition to attend a meeting (known as an ‘attendance notice’)

We expect that most notifications will be cleared rather than called in, and you will be informed of the outcome of the government’s decision during the 30 working day review period.

If the government wishes to call in the acquisition to investigate further, you will be informed by email on or before the final day of the review period.

Information or attendance notices issued during the review period do not change the 30 working day deadline. This is different from information notices and attendance notices issued during the assessment period. During the assessment period, the statutory timings are paused until the requirements of the information or attendance notice have been met.

Assessment period

Once the acquisition has been reviewed, the government will tell you by email if it needs to carry out a full assessment. This is known as ‘call-in’. Following a call-in, there will be an ‘assessment period’.

The “assessment period” consists of an ‘initial period’ of 30 working days, which may be extended by a further 45 working days (the “additional period”) and further by a period of time agreed by the government and the acquirer (the “voluntary period”.)

If an acquisition is called in for assessment, the government will continue to work with relevant departments to understand the acquisition in more detail. The Investment Security Unit (ISU) will remain the primary point of contact for parties to the acquisition.

A called-in acquisition may be cleared by the government at any time during the assessment period. This is called a final notification and you will be informed by email.

What the government can ask you to do during the assessment period

During the assessment period, the government can:

• put in place immediate and temporary controls to prevent you taking action that might undermine conditions the government might seek to put in place (known as an ‘interim order’)
• require you to provide further information to help complete its assessment (known as an ‘information notice’)
• require you or people involved in the acquisition to attend a meeting (known as an ‘attendance notice’)

Interim orders

An interim order can be issued within the assessment period if the government reasonably considers that such an order is necessary for the purpose of preventing or reversing pre-emptive action by parties or mitigating its effects. Pre-emptive action is any action that might prejudice the outcome of the assessment of an acquisition and/or to prevent any action which could have the effect of undermining conditions the government may seek to put in place through a final order.

An interim order may require a company to do or not do something. Examples include, but are not limited to, halting pre-completion steps or preventing the transfer of assets.

Interim orders may be issued at the point of call-in or at any stage of the assessment process after call-in if the government deems it to be necessary and proportionate.

The issuing of an interim order does not mean that the government will also issue a final order – an acquisition may still be cleared through a final notification. However, if a final order has been issued, the interim order ceases to have an effect once the final order comes into force.

Interim orders can be varied or revoked. The government expects such instances to be rare given the time limited nature of interim orders. A request to do so can be made by contacting the government by email (investment.screening@cabinetoffice.gov.uk).

Any party requesting a variation or revocation of an interim order will be required to provide an evidenced submission for the government’s consideration. Any request for variation should be based on material changes in circumstance since the interim order was made. It is up to the party requesting the variation to prove this is the case.

Information Notices

When assessing an acquisition, the government may request information from the parties, or third parties relevant to the acquisition. This will be done by serving information notices on relevant parties. This may be the acquirer, seller, target, or any other party which the government considers has information relevant to the assessment of an acquisition.

Information notices may be issued at any point and can be sent in advance of an acquisition being notified to the government.

An information notice will detail:

• The purpose for which the notice is given.
• What specific information is being requested.
• The time limit for providing the information requested (more detail set out below).
• The manner and format in which the information should be provided. Where possible this will be by email. If information of a particularly sensitive nature needs to be provided, the government will provide guidance on how this may be submitted.
• The consequences of failing to comply with an information notice.

It may be necessary to issue multiple information notices in an assessment of an acquisition. For reasons of confidentiality, parties should not expect to be told on whom an information notice has been served. On receipt of an information notice, parties may request a call with the government in order to discuss the notice and to clarify what is being asked.

Effect of information notices on the assessment period timeline

The serving of an information notice once a case has been called in and is in the assessment period has the effect of pausing the statutory timeline. The timeline is paused from the date it is issued until such time as the government is satisfied that the information provided has appropriately answered the questions posed. A decision to accept an information notice return will be communicated as soon as reasonably practicable, which may depend on the amount of information received.

The assessment period timeline will recommence on the first working day after the information notice response has been accepted as satisfactory. When this happens, the acquirer, the target and, where relevant, the seller of the qualifying entity will be informed of this by the government via an email which will detail the new statutory deadlines for the case.

Attendance Notices

When considering an acquisition, the government may require attendance from the parties, or third parties relevant to the acquisition. Parties to an attendance notice may bring legal representation to the session but are not required to do so.

An attendance notice will detail:

• The purpose for which the notice is given.
• The time and place parties are required to attend.
• An outline of the areas which will be discussed during the session.
• The consequences of failing to comply with an attendance notice.

Where it is possible to do so, the government will aim to host attendance notice evidence sessions virtually to minimise costs for parties. Where this is not an option, attendance notice meetings will usually take place in government buildings in central London.

The issuing of an attendance notice has the effect of pausing the assessment period from the date on which the notice is issued until the day after which the parties comply with the requirements of the notice. Where possible, the government will work with parties to agree the timing and logistics of a meeting before issuing a notice. Attendance notices will not usually be issued during the review period.

By the end of the initial period

By the end of the initial period, parties will be informed of one of the following:

• your acquisition is cleared and can carry on (the final notification)
• your acquisition can go ahead subject to certain conditions (the final order)
• your acquisition is blocked and cannot carry on (the final order)
• the assessment period needs to be extended for another 45 working days

If the assessment period is extended

Additional period

The government may extend the assessment period by making use of the additional period, allowing a further 45 working days to assess the acquisition. Additional period notices will be sent to the relevant parties while copying in legal representatives.

While the government may decide at any point during the initial period that an additional period is appropriate, it will only begin on the first working day after the end of the 30 working day initial period. As with the initial period, the clock will be paused if it is necessary to issue an information or attendance notice.

The time will usually be used to assess what, if any, remedies are appropriate and to seek representations from the parties.

Voluntary period

In some cases, the government may consider that more time is needed at the end of the additional period. In such cases, a voluntary period may be agreed with the relevant parties. This is often used to further develop remedies to mitigate national security risk and/or to allow acquirers to make further representations on proposed remedies.

A voluntary period may be requested in writing by the acquirer or the government at any point during the additional period. If an acquirer believes that additional time would allow them to provide further representations to the government which they believe would be materially useful in the assessment of their acquisition, they are encouraged to request a voluntary period via correspondence with the government by emailing (investment.screening@cabinetoffice.gov.uk). A voluntary period and its duration must be mutually agreed, in writing, by the government and the acquirer.

A voluntary period begins on the first working day after the end of the additional period. More than one voluntary period may be agreed if needed.

How government may inform parties that a final order is being considered

Before making a final order, the government must consider any representations made. Representations should be made to the government via email (investment.screening@cabinetoffice.gov.uk).

In cases where the government is considering issuing a final order, the government may write to inform relevant parties of this and invite them to make representations to inform the government’s decision making.

Depending on the facts of the case, this letter may inform the acquirer that the government is considering issuing a final order and provide information about the remedies they are considering. Where possible, this may include an overview of the national security risks identified, but given the sensitive nature of this information, it will not always be possible to provide detailed descriptions of those risks.

If parties receive such a letter outlining proposed remedies under consideration, they may wish to make written representations regarding the proposals, which could include the feasibility of the proposed remedies and any alternative remedies. The government must consider all representations made but is not bound to accept any alternative remedies proposed.

Parties do not need to wait for the government to suggest remedies in a case. If an acquirer believes that it has identified a remedy that it considers will mitigate any potential national security risk, it can make representations at any point in the process.

Communicating decisions to parties

If the government determines there are national security risks arising from your acquisition, representatives of the parties and yourself may be contacted at any stage during the assessment period to be informed of conditions the government may consider putting in place through a final order. The purpose of these conditions is to mitigate national security risk.

You will be issued a final order if the government imposes conditions on your acquisition, or if your acquisition is blocked. Relevant parties will be provided with information about the decision, including details of any conditions imposed and the consequence of any breach of these conditions.

When the government makes a decision, the following approach is used to inform parties:

• Final notifications and retrospective validation notices notifying the parties that no further action will be taken after the review period will be issued to the relevant parties, and legal representative of the notifier.
• Call-in notices will be issued to the relevant parties, copied to the legal representatives via email. This includes instances (as required by the NSI Act) where the qualifying entity is unaware of the proposed acquisition.
• Final notifications following a call-in and final orders will be issued to each person to whom the call-in notice was given.

Notices of final orders made by the government will be published on Gov.uk. The government will remove sensitive information.

Withdrawing from an acquisition after call-in

There will be instances where the parties involved choose to withdraw from an acquisition before the process under the NSI Act is complete.

If for any reason an acquirer, target or seller should decide to withdraw from an acquisition which has been notified to the government (or which has been called in) they should inform the government in writing and will be required to provide evidence that this is the case. Parties can withdraw from an acquisition at any stage of the NSI process.

Following a formal withdrawal, any new or revised arrangement that meets the legal tests under the NSI Act would constitute a separate trigger event and might be subject to a new review.

If the government is satisfied that parties to an acquisition have withdrawn from it and no longer intend to complete an acquisition, no final order will be issued by the government and, where appropriate, a final notification will be issued.

Carrying on an acquisition while review and assessment is ongoing

You can continue to progress an acquisition during the review and assessment periods up to the point of completion unless the government has told you not to through an interim order. Interim orders can only be issued during the assessment period, and may place immediate and temporary controls on the parties to prevent any action which could have the effect of undermining conditions the government may seek to put in place through a final order.

In the case of mandatory notification, you must not complete the acquisition until you have received clearance from the government. If you do complete without clearance, the acquisition will be legally void.

In the case of a voluntary notification, you may choose to continue your acquisition (unless the government has told you not to do so through an interim order). However, if you choose to complete your acquisition before the government has made its decision, the acquisition can later be unwound if the government finds that there are national security concerns.

Confidentiality whilst review and assessment is ongoing

The government will not routinely make public that it has called in an acquisition for national security assessment or that the government has issued an interim order. Relevant parties will be informed if the government intends to do so.

Throughout the review and assessment periods, and in any interactions with the government, you should remain mindful of the other legislative obligations that you may be under. For example, if you are a relevant issuer, you will still need to comply with applicable transparency and disclosure obligations such as the obligation under the UK Market Abuse Regulation to disclose inside information to the public as soon as possible.

If your disclosure obligations give rise to any doubts or concerns about your ability to comply with any specific requirements raised during the review and assessment process, or as a result of interim or final orders you are subject to, you can contact the government at investment.screening@cabinetoffice.gov.uk.

Find further information on the UK Market Abuse Regulation on the Financial Conduct Authority’s website.

After the assessment period

If no further action is being taken following the full national security assessment, you will be informed by the government that the acquisition has been cleared. That decision cannot be revisited. The only exception is if it is established that false or misleading information was provided in a notification form or in response to an information notice or attendance notice.

Where you are subject to interim orders or final orders, the government has a duty to keep these under review and to vary and/or revoke them, where appropriate. This would generally happen in discussion with the parties, who can also request that the order be reviewed.

What to do if you think you require financial assistance as a result of a final order

The NSI Act gives the government the power to provide financial assistance to businesses and other parties affected by a final order (under Section 30 of the Act). This could, for example, include loans, guarantees or indemnities. There is no power to provide financial assistance unless a final order has been made, even if an interim order has been made.

Any requests for financial assistance will be considered by the government on a case-by-case basis. A request should be sent to the Investment Security Unit and accompanied by documentary evidence to enable the government to complete due diligence checks.

The government is not obligated to provide financial assistance and this is not a general compensation scheme. The government expects to provide financial assistance very rarely, and only when no appropriate alternative is available.

Any requests for financial assistance will be carefully reviewed. Parties should contact the government if they believe a use of section 30 would be appropriate.

Compliance and enforcement

Read guidance on how to comply with the National Security and Investment Act 2021 and what can be expected if you are subject to orders and notices.

How and when the government will publish information related to the NSI Act

There are no statutory requirements under the NSI Act for the government to publish information about individual acquisitions prior to a final order being made. The government is, however, required to publish notice of the fact that a final order has been made. This approach reflects the government’s intention to minimise the potential for the system of the NSI Act to create commercial distortions in the market.

The NSI Act does not, however, preclude such announcements being made. There are a number of situations where this may be relevant, including:

• where a party is a public company and has existing statutory obligations to inform the market of price-sensitive information
• where a party wishes to communicate a decision publicly for business or reputational reasons
• where a party is seeking to raise external awareness of the government’s consideration of an acquisition

General practice

The government will not publish information regarding the receipt (or not) and the acceptance or rejection of individual notifications.

The government may choose to publish information regarding call-in notices or final notifications (clearances) following the review period – primarily either where the parties disclose such information, or the acquisition is otherwise in the public domain and the government considers it is in the public interest to do so.

For acquisitions which are called in and subject to an interim order, the government will not publish information about the specific contents of any such order, but may choose to state that one has been made.

The government may choose to publish information regarding final notifications (clearances) following the assessment period – primarily either where the parties disclose such information, or the acquisition is otherwise in the public domain and the government considers it is in the public interest to do so.

Process

Announcements will be made on Gov.uk.

Where the government chooses to make a proactive announcement (that is, rather than responding to a prior disclosure by one or more of the parties), it will ordinarily seek to provide advance notices to the parties of the planned announcement and to make it when the relevant markets are closed.

Further guidance

For businesses seeking investment, considering potential security issues early in your investment planning can protect both your company and the UK’s national security. Read guidance on Informed Investment for practical advice on how to reduce potential risks associated with investment.

For protective security advice and guidance for the academic sector to help secure international research collaborations read guidance on Trusted Research

For protective security advice and guidance to help emerging technology companies and start-ups protect their innovation, read guidance on Secure Innovation for the emerging technology sector

For guidance on how businesses in the Uk’s thriving science and technology centre can protect themselves from being compromised by certain states for their technological, economic, political, and military gain, read guidance on Counter State Threats

Read the UK’s critical minerals strategy which aims to improve the security of supply of critical minerals

Read the UK’s national semiconductor strategy which sets out the Government’s plans to build on the UK’s strengths in semiconductors to grow the sector, increase our resilience and protect our security.

Those investing at the direction of certain foreign powers may need to register under the Foreign Influence Registration Scheme: read the guidance.

Contact the Investment Security Unit (ISU)

For general enquiries or informal discussion around future acquisitions or a specific notification, please contact the government at investment.screening@cabinetoffice.gov.uk.