Brexit: defence and security

How will exiting the European Union affect the UK's defence and security? Read analysis from Parliament's libraries and committees on the impact of Brexit.

Exiting the European Union and sanctions
Examines the implications of Brexit on the legislation governing the imposition of international sanctions

Brexit and data protection  (updated: 27 July 2017)
Looks at the reform of EU data protection law and what might happen after Brexit

Brexit: implications for national security
Examines the possible impact of Brexit on national security and Europe-wide sharing of secret intelligence

Negotiating priorities for justice system
Justice Committee report says Government must continue to co-operate with EU on criminal, commercial and family law

The UK and relations with Ireland
Examines the implications on the relationship with Ireland, particularly, in regards to peace, security and trade

Implications for policing and criminal justice cooperation
EU law on policing and criminal justice cooperation covers five areas:

  • Mutual recognition
  • Participation in EU agencies
  • Information sharing
  • Substantive criminal law
  • Criminal procedure

Exiting the EU and security, law enforcement and criminal justice
Information produced ahead of the debate on 18 January 2017

UK armed forces and diplomatic service
Information produced ahead of the debate on 8 December 2016

The UK and Ireland
Examines peace, security and trade between UK and the Republic of Ireland

Future EU-UK security and police co-operation inquiry
Examines the agencies that underpin security and police cooperation between the UK and EU and options for retaining or replacing them

Foreign and security policy cooperation
The implications of foreign and security policy cooperation with European countries

Further reading

Brexit reading list on policing and criminal justice
The implications for policing and criminal justice cooperation and national security

Brexit reading list on defence and security (updated: 12 June 2017)
A selection of analysis and comment on defence and security related matters


UK and Brexit: stay up to date

Receive updates when we add new content on this subject.  

News from across the House

News from across the House of Commons and House of Lords

Brexit glossary

List of commonly-used terms and acronyms, for example:

  • Article 50 TEU
  • Hard Brexit
  • Soft Brexit
  • Smooth Brexit
  • Red, white and blue Brexit
  • Great Repeal Bill

Background to the referendum

Reports and briefings on the UK's EU referendum 2016

Author information

Commons and Lords Library service

Authors of the research briefings are available to discuss them with Members and their staff. The research briefings are published to the UK Parliament website.

Select Committees

Both Houses establish select committees to conduct inquiries and to produce reports on a range of matters, from the conduct of Government to specialist subject areas. Information on their work can be found on the website.

Parliamentary Office of Science and Technology (POST)

POST provides research from across the biological, physical and social sciences, and engineering and technology

Image copyright

Copyright: SAC Andy Masson/RAF/MOD/Crown Copyright 2010