Prime Minister Theresa May would write to the European Union on March 29, formally announcing Britain’s withdrawal from the bloc.
The letter will start the clock ticking on a two-year countdown to Brexit and allow negotiations to start between London and Brussels in the coming weeks.
By the end March, after he has received May’s letter, European Council President Donald Tusk should have distributed draft guidelines for the negotiations to the 27 other national governments.
Tusk will also summon those 27 leaders for a summit to endorse the final guidelines, probably in early May.
Once those are in place, giving a negotiating mandate to the EU executive, the European Commission, chief EU negotiator Michel Barnier should be able to schedule talks with his British counterpart, Brexit Secretary David Davis.
It can recalled that on March 16, Queen Elizabeth formally granted May the power to trigger exit talks with the European Union, approving legislation which passed through parliament late on Monday.
The announcement, made in parliament by speaker John Bercow, confirms that May can begin divorce talks at any time, although her spokesman hinted on Monday that any such decision was likely to come towards the end of the month rather than in the coming days.