EU leaders will meet at 17:00 BST for an emergency summit in Brussels to decide whether to offer the UK another delay to Brexit.
Theresa May wants to postpone the UK’s exit beyond this Friday, until 30 June.
But the EU is expected to offer a longer delay, after European Council President Donald Tusk urged the other 27 leaders to back a flexible extension of up to a year – with conditions.
Tusk added that “neither side should be allowed to feel humiliated”.
Leaders will begin arriving at the summit from 16:00.
Earlier, May appeared in the Commons for the weekly question session with opposition leader Jeremy Corbyn at Prime Minister’s Questions.
That head-to-head followed five days of talks between the government and Labour officials aimed at breaking the Brexit impasse.
The 1922 Committee made up of Tory backbench MPs will also meet at 17:00, with some members seeking a firm date for May to step down as leader of the party.