, the United Kingdom's post-Brexit relationship with the European Union and its members is governed by the Brexit withdrawal agreement and the EU–UK Trade and Cooperation Agreement. The latter was negotiated in 2020 and has applied since 2021.
Following the UK's withdrawal from the EU on 31 January 2020, the UK continued to conform to EU regulations and to participate in the EU Customs Union during the "Brexit transition period", which began on 1 February 2020 and ended on 31 December 2020. This allowed for a period of time to negotiate a bilateral trade agreement between the UK and the EU.
Developments
Timeline
23 January 2023: Shadow Foreign Secretary David Lammy, in a speech at Chatham House, announced that if elected the next Labour government would use the next scheduled review of the TCA to increase cooperation with the EU. 11 February 2023: Reports emerged of a secret cross-party meeting of senior current and former politicians from the Conservative Party - including Cabinet Minister Michael Gove -and the Labour Party to address failures within the UK-EU relationship under the Trade and Cooperation Agreement. 27 February 2023: UK Foreign Secretary James Cleverly and European Commission Vice-President Maroš Šefčovič agree and sign the Windsor Framework to resolve issues on the implementation of the Northern Ireland Protocol.
Opinion polling in the United Kingdom
Since May 2022, opinion polling has shown a steady increase in the numbers of Britons seeking to rejoin the European Union, with the number polled opting to stay outside the EU declining.
In November 2022, 53% of Brits polled would opt to re-join the EU if another referendum were held, with 34% opting to stay out (14% unsure).
Trade
The UK has decided to withdraw from the single market, the customs union. Furthermore for all international agreements the EU entered into, the EU participation does not include the UK since 1 January 2021.
Those definitive changes could create difficulties which might be under-estimated, according to Michel Barnier: re-introduction of customs formalities, as was the case before UK membership, for every product imported and exported to and from the EU and the UK end of financial passporting rights for the UK services sector end of Community preference to all goods, trade and people from the UK in EU member states UK product certification will no longer be recognized within the EU imposition of non-tariff barriers to trade, such as the possibility of lengthy delays at the border, import quotas and immigration restrictions resulting from the loss of EU citizenship for UK workers
Post-Brexit negotiations have tried to create an ambitious pact between the UK and the EU to avoid disruption as much as possible, according to Michel Barnier.
UK membership of the European Economic Area
The UK could have sought to continue to be a member of the European Economic Area, perhaps as a member of EFTA. In January 2017, Theresa May, the British Prime Minister, announced a 12-point plan of negotiating objectives and said that the UK government would not seek continued membership in the single market.
WTO option
The no-deal WTO option would involve the United Kingdom ending the transition period without any trade agreement and relying on the most favoured nation trading rules set by the World Trade Organization. The Confederation of British Industry said such a plan would be a "sledgehammer for our economy", and the National Farmer's Union was also highly critical. Positive forecasting for the effects of a WTO Brexit for the UK cite other countries' existing WTO trade with the EU and the benefits of repossessing full fishing rights for a maritime island nation.
People
Immigration
The EEA Agreement and the agreement with Switzerland cover free movement of goods, and free movement of people. Many supporters of Brexit want to restrict freedom of movement; the Prime Minister ruled out any continuation of free movement in January 2017.
Science and technology
Scientific research
The UK and EU came to an agreement in September 2023 for the United Kingdom to rejoin the European Union's funding programme for scientific research, Horzion Europe.