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Brexit: EU-UK relationship

The United Kingdom withdrew from the European Union on 31 January 2020.

On 23 June 2016, the United Kingdom held a referendum on their membership of the EU. The UK voted to leave the EU by 52% to 48%.

On 29 March 2017 the UK notified the European Council of its intention to leave the EU, thus formally triggering Article 50 of the Treaty on European Union.

On 30 January 2020, the EU ratified the Withdrawal agreement.

On 31 January 2020 at midnight (CET), when the withdrawal agreement entered into force, the United Kingdom left the European Union.

The entry into force of the withdrawal agreement marked the end of the period under Article 50 TEU and the start of a transition period due to last until 31 December 2020.


Below, you will find a


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Key documents


Latest agreement document Published in
TRADE AND COOPERATION AGREEMENT BETWEEN THE EUROPEAN UNION AND THE EUROPEAN ATOMIC ENERGY COMMUNITY, OF THE ONE PART, AND THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND, OF THE OTHER PART OJ L444 31.12.2020
AGREEMENT BETWEEN THE EUROPEAN UNION AND THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND CONCERNING SECURITY PROCEDURES FOR EXCHANGING AND PROTECTING CLASSIFIED INFORMATION OJ L444 31.12.2020
AGREEMENT BETWEEN THE GOVERNMENT OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND AND THE EUROPEAN ATOMIC ENERGY COMMUNITY FOR COOPERATION ON THE SAFE AND PEACEFUL USES OF NUCLEAR ENERGY OJ L 445, 31.12.2020
Notice concerning the provisional application of the Trade and Cooperation Agreement between the European Union and the European Atomic Energy Community, of the one part, and the United Kingdom of Great Britain and Northern Ireland, of the other part, of the Agreement between the European Union and the United Kingdom of Great Britain and Northern Ireland concerning security procedures for exchanging and protecting classified information and of the Agreement between the Government of the United Kingdom of Great Britain and Northern Ireland and the European Atomic Energy Community for Cooperation on the Safe and Peaceful Uses of Nuclear Energy OJ L 1, 1.1.2021
Council Decision (EU) 2020/2252 of 29 December 2020 on the signing, on behalf of the Union, and on provisional application of the Trade and Cooperation Agreement between the European Union and the European Atomic Energy Community, of the one part, and the United Kingdom of Great Britain and Northern Ireland, of the other part, and of the Agreement between the European Union and the United Kingdom of Great Britain and Northern Ireland concerning security procedures for exchanging and protecting classified information OJ L444 31.12.2020
Council Decision (Euratom) 2020/2253 of 29 December 2020 approving the conclusion, by the European Commission, of the Agreement between the Government of the United Kingdom of Great Britain and Northern Ireland and the European Atomic Energy Community for Cooperation on the Safe and Peaceful Uses of Nuclear Energy and the conclusion, by the European Commission, on behalf of the European Atomic Energy Community, of the Trade and Cooperation Agreement between the European Union and the European Atomic Energy Community, of the one part, and the United Kingdom of Great Britain and Northern Ireland, of the other part OJ L444 31.12.2020
Declarations referred to in the Council Decision on the signing on behalf of the Union, and on a provisional application of the Trade and Cooperation Agreement and of the Agreement concerning security procedures for exchanging and protecting classified information OJ L444 31.12.2020
EU-UK Trade and Cooperation Agreement - Notification by the Union OJ L444 31.12.2020


Summaries of EU legislation


Documents related to the UK membership to the EU

2016

2007: Treaty of Lisbon

2003: Accession Treaty

2001: Treaty of Nice

1997: Treaty of Amsterdam

1992: Treaty of Maastricht

1985: UK rebate

1972: Treaty of Accession of Denmark, Ireland and the United Kingdom (1972)



Updated: 12/01/2021