In a historic referendum on June 23, 2016, the United Kingdom voted to leave the European Union, with 52% of the public supporting the departure in a move known as Brexit.

Following the referendum, the UK formally triggered Article 50 in March 2017, beginning a complex and lengthy negotiation process to determine the terms of its exit.

The UK officially left the EU on January 31, 2020, marking the end of a 47-year membership and entering a transition period that concluded on December 31, 2020, to establish new post-Brexit relations.

Will UK rejoin the European Union before 2050?

Resolves Yes if UK completed joining the European Union before 2050

• Update 2025-02-17 (PST) (AI summary of creator comment): Resolution Clarification:

  • If the EU is renamed or succeeded by another organization, it will count as a rejoin as long as the new organization largely consists of similar constituent countries as the current EU.

  • The creator will use their judgement to determine whether the renamed organization meets this criterion.

  • Users concerned about this interpretation are advised not to bet on this market.