When was brexit

Last updated: April 1, 2026

Quick Answer: Brexit occurred on January 31, 2020, when the United Kingdom officially left the European Union after 47 years of membership. The transition period continued until December 31, 2020.

Key Facts

The Brexit Referendum

Brexit, the process of the United Kingdom leaving the European Union, began with a historic referendum on June 23, 2016. British voters were asked whether the UK should remain a member of the EU or leave. The results were closely divided, with 51.9% voting to leave and 48.1% voting to remain. The referendum result was significant because it represented a major political shift, as support for EU membership had been relatively consistent in previous decades. The Leave campaign, led by figures including Nigel Farage and Boris Johnson, focused on themes of sovereignty and immigration, while the Remain campaign emphasized economic benefits of EU membership.

Negotiation Period (2016-2020)

Following the referendum result, the UK government began the formal process of negotiating EU departure. The negotiation period lasted approximately 3.5 years, during which British and EU officials discussed withdrawal terms, trade arrangements, and future relationships. Multiple extensions were granted to the original Article 50 deadline as negotiations proved complex. Key issues included the Irish border, citizens' rights, financial settlements, and the structure of future trade relationships. The complexity of unwinding 47 years of integration made reaching agreement challenging, with multiple deadlines passed before final arrangements were settled.

Formal Departure and Transition Period

The United Kingdom formally left the European Union on January 31, 2020. However, rather than an immediate complete separation, a transition period was established lasting until December 31, 2020. During this period, the UK remained part of the EU single market and customs union while negotiating final trade and cooperation agreements. This transition gave businesses time to adjust to new arrangements and allowed negotiations to continue under defined terms. The transition period represented a middle ground between full EU membership and complete separation, providing stability during the adjustment period.

Trade and Cooperation Agreement

On December 24, 2020, just one week before the transition period ended, the UK and EU announced they had agreed on a Trade and Cooperation Agreement. This agreement was concluded after intensive last-minute negotiations. The deal outlined future trade relationships, security cooperation, and other areas of mutual interest. The agreement took effect on January 1, 2021, marking the beginning of the new relationship between the UK and EU. Key provisions included tariff-free trade in goods, though with new customs procedures, and various arrangements for services, including financial services.

Post-Brexit Impact and Ongoing Developments

Since the formal departure and the implementation of the Trade and Cooperation Agreement, the UK has experienced numerous changes. Businesses have adapted to new customs procedures, import/export requirements, and regulatory differences. Immigration rules have changed, with new arrangements for EU citizens and UK citizens abroad. The impact has been mixed, with some sectors experiencing disruptions while others have adapted successfully. Discussions continue regarding Northern Ireland's special status and border arrangements. Political debates about the effectiveness of Brexit negotiations and future arrangements with the EU remain ongoing, with various reviews and negotiations addressing specific issues that have emerged since departure.

Related Questions

What does Brexit mean?

Brexit is a portmanteau of 'British' and 'exit,' referring to the UK's departure from the European Union. It represents the process of unwinding 47 years of EU membership and establishing new relationships.

Why did the UK vote to leave the EU?

The Leave campaign emphasized sovereignty, immigration control, and reducing EU regulations. Voters in certain regions felt the EU was unresponsive to local concerns, though reasons varied across the country.

What changed after Brexit?

Changes include new customs procedures, import/export requirements, immigration rules for EU citizens, regulatory differences, and trade arrangements. Businesses and individuals have had to adapt to new procedures and regulations.

Sources

  1. Brexit - Wikipedia CC-BY-SA-4.0
  2. Brexit - UK Government Official proprietary