Key dates in Britain's relations with the European Union
The referendum
June 23, 2016: At a referendum organised after the Conservatives come to power in 2015, Britain votes by 52 per cent to 48 per cent to quit the EU. Prime minister David Cameron, who had campaigned to remain, resigns.
Two-year deadlock
March 29, 2017: Cameron's successor, Theresa May, starts the two-year countdown to Britain leaving the bloc with a formal letter of notice to EU president Donald Tusk.
Provisional agreement
November 22, 2018: Britain and the EU reach a provisional agreement on their post-Brexit relations, a week after striking a draft divorce deal. It is formalised on November 25 by EU leaders.
Impasse
January 15, 2019: Britain's lower house of parliament votes against the deal, the first of three times it will do so.
Brexit delayed
April 10-11: The European Union agrees to delay Brexit until October 31.
Theresa May resigns, Johnson swears in
July 24: Brexit figurehead Boris Johnson replaces May as prime minister, vowing to take Britain out of the EU on October 31 with or without a deal.
New deal, new delay
October 17: European Commission president Jean-Claude Juncker and Johnson announce their agreement on a new draft Brexit accord.
British parliament delays vote
The British parliament delays its vote on the text, forcing Johnson to ask Brussels for a new postponement of the Brexit date. It is set for January 31, 2020.
Brexit becomes reality
January 31, 2020: Brexit comes into force after the European Parliament gave the final approval to it on January 29.
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