Change description : 2026-03-13 11:42:00: Added links to ‘Named Information Officer’, ‘Named Training and Competency Officer’ and ‘Suitably Qualified Person role’ guidance. [Guidance and regulation]
The government is committed to the protection of animals through the implementation of the 3Rs (reduction, replacement and refinement) across all licensed projects involving animals in science.
In England, Scotland and Wales, you need 3 licences from the Home Office before you can carry out procedures using living animals:
an establishment licence for the place where the work is carried out
project licences for the programmes of work
personal licences for each person carrying out procedures on animals
ASPA sets out the framework for regulating the use of animals in science and research. The following set out minimum legal standards and guidance under ASPA.
Code of practice
Section 2 of the code of practice describes the minimum legal standards for the housing and care of animals bred, supplied or used for scientific purposes. Section 3 provides non-mandatory advice to encourage establishments to continuously improve their standards of housing and care for better animal welfare.
Standard conditions for licences
ASRU grants licences subject to standard conditions, which are the minimum legal requirements of a licence.
The guidance on the operation of ASPA explains how the act is overseen and enforced, and sets out the responsibilities of those with roles under ASPA.
It provides detailed guidance to licence holders and applicants on topics including minimum legal standards, severity classifications and humane killing.
Guidance on training and continuous professional development under ASPA
the governance framework for training and continuous professional development
specific training requirements for licensing under ASPA
the learning outcomes of the training required
It includes both minimum legal standards and guidance.
Technical advice notes
The technical advice notes provide further detailed advice on how to comply with ASPA. (Reference to each specific advice note is included where it is relevant in the ‘apply for a project licence’ section of this page.)
People in named person roles are responsible for specific activities under the PEL, and their names must be added to the PEL in ASPeL. For example, the Named Animal Care and Welfare Officer oversees the care and welfare of animals.
Read about the requirements for named person roles in:
The testing of finished household products is banned under ASPA. Read the household products testing ban advice note for advice on the requirements for testing ingredients for household products.
If you are carrying out research for regulatory bodies outside the UK, for example the USA, and the study requirements exceed the UK regulatory requirements, you must submit a prospective authorisation request to ASRU.
Under ASPA, ASRU must collect and publish annual statistics on the use of protected animals in regulated procedures .
PPL holders must record and provide data each year on procedures that have been carried out as part of their project - an annual return on procedures. Data returns must be completed in ASPeL at the end of the calendar year.
Prepare for an audit
ASRU carries out a range of audits at licensed establishments. The type of audit is decided by ASRU. The purpose is to assess whether licence holders are complying with ASPA, licence conditions and the code of practice, and to provide feedback to guide ongoing compliance.
You can read more about the audit process and the criteria inspectors use in:
Provide as much information as possible, so ASRU can assess the case quickly and accurately.
Self-reporting demonstrates that licence holders are aware of their responsibilities and are committed to creating a culture of compliance in their establishments.
ASRU expects that:
self-reporting is part of an establishment’s governance frameworks and culture of care
employees know how to raise concerns within their establishment
Report a potential or actual breach of licensed severity limits (standard condition 18 notification)
PPL standard condition 18 (SC18) requires the PPL holder to comply with the severity limits (and other controls) set out in the PPL to limit the suffering of animals.
PPL holders must notify ASRU as soon as possible (within 72 hours) if:
adverse effects from procedures have resulted in, or are likely to result in, higher levels of suffering than set out in the PPL
controls set out in the PPL, such as humane endpoints, have been, or are likely to be, breached
there have been adverse effects that are not set out in the PPL
If you plan to keep animals alive following a breach of licensed severity limits, you need authorisation from ASRU.
You must submit a request immediately using the SC18 notification form (ODT, 31.8KB). The 72-hour deadline for SC18 reports does not apply, because it is unlawful to keep animals alive when severity limits (or any other controls) in a PPL have been breached.
Email the form to ASRUStandardCondition18@homeoffice.gov.uk and label your email subject line ‘Urgent - Request to keep animals alive SC18’. Ensure you include the scientific justification for keeping the animals alive.
Made the following changes: 1) Added an overview section to provide context on ASRU and licensing, with links to other relevant pages. 2) Added a section on minimum legal standards and guidance. 3) Updated the information on processes to follow, including clarifying the difference between reporting non-compliance and reporting a potential or actual breach of licensed severity limits.
Replaced Potential non-compliance notification form as a Word version.
7 March 2024
Added the prospective authorisation word document form.
9 February 2024
Added the prospective authorisation form and guidance.
24 January 2024
Adding information on the complaints procedure.
13 November 2023
Updated email address for requesting content about the ASRU newsletter.
12 October 2023
Non-compliance notification form published.
20 October 2022
Removed link to improving your project licence application - guidance is out of date.
29 September 2022
Added link to 'Guidance notes for project license applications' and new section on when to contact ASRUPOLEnotification@homeoffice.gov.uk.
28 June 2022
Added the following documents: standard genetically altered rodents protocols, standard genetically altered zebrafish protocols, guidance on the use of standard genetically altered animals.
4 May 2022
Updated email addresses under 'Apply for licence' and 'Contact information and forms'. Updated 'Register for updates' form link.
8 April 2022
Updated 'Bridging ways of working guidance' PDF.
15 October 2021
Added link to "Process and standards for establishment full system audits" in "Animals in Science Regulation Unit (ASRU) Guidance and regulatory advice" section.
29 September 2021
'Contact us' section updated to include (word) enquiry form.
18 August 2021
Bridging ways of working guidance added.
15 December 2020
Added link to non-technical summaries granted in 2020.
3 September 2020
Added link to non-technical summaries granted in 2019.
30 July 2020
Added a link to the 2019 statistics on scientific procedures on living animals.
28 May 2020
Updated to change link from 2017 annual report to 2018 annual report.
16 March 2020
Added a link to non-technical summaries granted in 2018.
6 February 2020
Added link to non-technical summaries granted in 2017.
25 July 2019
Added a link to the 2018 statistics on scientific procedures on living animals.
3 December 2018
Updated to add 2017 annual report
11 May 2018
Added a new section called, Project Licence Standard Condition 18 notification.
12 March 2018
Published 2016 annual report
29 August 2017
Updated guidance.
10 August 2017
Added 2016 scientific procedures on living animals report.
27 June 2017
Newsletter published.
10 February 2017
Latest newsletters published.
7 February 2017
2017 annual return form and guidance published.
22 December 2016
Newsletter added
10 October 2016
Updated application guidance published
20 July 2016
Updated scientific procedures on living animals link to the 2015 publication.
7 July 2016
Information about working with animals taken from the wild included.
27 May 2016
Guidance on standard breeding protocols for genetically modified animals
15 April 2016
Added non-technical summaries for projects granted in 2014.
11 February 2016
Guidance on the use of human material in animals published.
5 February 2016
Form for 2016 annual returns of procedures published.
18 December 2015
Updated instructions for the annual returns procedures 2015 published.
16 December 2015
New animal use data return procedures form published.
22 October 2015
Removed form for outstanding returns from 2014.
22 October 2015
Three advice notes published.
23 March 2015
Updated guidance.
10 March 2015
Updated overview summary.
4 March 2015
Updated version.
17 December 2014
Explanatory memorandum to the code of practice for the care and accommodation of animals published.
17 December 2014
Code of practice for the care and accommodation of animals (short guide) published.
10 July 2014
Added links to 'Statistics of scientific procedures on living animals, Great Britain 2012' and 'Animals in Science Regulation Unit Annual Report 2012'.
20 May 2014
Link to section 24 online consultation added.
13 March 2014
Guidance on Animals (Scientific Procedures) Act 1986 (ASPA) has been published.
18 February 2014
Guidance on the naming of products and substances in project licences for batch quality control and regulatory toxicology added.
17 February 2014
Volume 1 of the non-technical summaries from licences granted during 2013 released.
29 January 2014
Annual returns instructions, notes and form updated