thumb|upright|Boris Johnson Prime Minister of the United Kingdom from 2019 to 2022 On 23 June 2016, the citizens of the United Kingdom voted to withdraw from the European Union in a referendum and subsequently became the first and to date only member to trigger Article 50 of the Treaty on European Union (TEU). The vote was in favour of leaving the EU by a margin of 51.9% in favour to 48.1% against. The UK's withdrawal was completed on 31 January 2020.
thumb|upright|Boris Johnson Prime Minister of the United Kingdom from 2019 to 2022 On 23 June 2016, the citizens of the United Kingdom voted to withdraw from the European Union in a referendum and subsequently became the first and to date only member to trigger Article 50 of the Treaty on European Union (TEU) The vote was in favour of leaving the EU by a margin of 51.9% in favour to 48.1% against. The UK's withdrawal was completed on 31 January 2020.