European leaders agree to back a deal on the European Union's long-term budget after a deal is done on a rebate for the United Kingdom.
Canada, the European Union, the United Kingdom, the United States and Japan freeze all assets of the Russian Central Bank and the Russian National Wealth Fund under their jurisdiction, preventing the usage of more than a third of Russia's $630 billion of foreign exchange reserves.
A planned US$66 billion merger between British semiconductor company Arm Ltd. and American hardware company Nvidia is cancelled after facing regulatory pressures from the United States, the European Union, the United Kingdom, and China. Arm says that it will instead go public sometime before March 2023. If the deal were successful, it would have been the largest merger in the history of the semiconductor industry.
France imposes a ban on British citizens from entering the country without compelling reasons due to the spread of the SARS-CoV-2 Omicron variant in the United Kingdom. French and EU citizens returning from the UK must self-isolate for seven days unless they show a negative COVID-19 test result on arrival, which will reduce the self-isolation to 48 hours.
The United Kingdom eases its quarantine requirements for fully vaccinated travellers from the United States and European Union countries other than France where most of them are in the "amber list" category in order to reunite family and friends whose loved ones live abroad. Travellers will still need to take either a lateral flow or PCR test before their departure, and a PCR test on the second day after their arrival.
Iranian President Hassan Rouhani sends letters to the P5+1 leaders of the United Kingdom, China, Russia, Germany, France and the European Union announcing the country's partial withdrawal from the 2015 Joint Comprehensive Plan of Action agreement. Furthermore, Iran announces that it will stop exporting uranium and heavy water from its nuclear program.
The United Kingdom and European Union agree to delay Brexit until October 31, 2019. This means that the UK will participate in next month's European Parliament election.
Thousands of pro-European Union supporters of Open Britain, the European Movement and Britain for Europe demonstrate across the United Kingdom calling for a referendum on the final terms of the UK's planned exit from the European Union.
Lord Hill resigns as European Commissioner after the United Kingdom votes to leave the European Union.
The United Kingdom votes, 52% to 48%, to leave the European Union. Prime Minister David Cameron, who called the referendum three years ago, announces his resignation indicating he will leave office by October.
According to an opinion poll, a majority of British citizens now want the United Kingdom to leave the European Union as voter anxiety rises over the bloc's handling of a crisis provoked by an influx of migrants into Europe. A referendum on the United Kingdom's EU membership is scheduled to take place before the end of 2017.