Prime Minister Theresa May is facing the prospect of a vote of no confidence in her leadership as Conservative MPs rally against her.
Jacob Rees-Mogg confirmed that he had submitted a letter of no confidence in May to the 1922 Committee on 15 November and more are believed to have gone in since.
If the 1922 Committee chairman, Graham Brady, receives 48 letters of no confidence then a vote of no confidence is triggered. But that is not necessarily the end for May as PM, here is what would happen next…
If 48 letters of no confidence (15% of Tory MPs) are delivered then a vote would take place of all Conservative MPs either for or against the PM.
The prime minister would need to win half of them (159) to remain in power, without that support, a leadership contest would take place.
Mrs May has stated before that she would fight any challenge, so a vote could be called and she could still win it to retain power. If May won then there could not be another vote of no confidence for another year.
The last time this happened in the Conservative Party was in 2003 when Iain Duncan Smith ultimately lost a vote of no confidence.
There were less Tory MPs at that point so it took just 25 letters of no confidence to trigger the vote, which Duncan Smith lost 90-75.
The turnaround was remarkably quick in 2003, with reports emerging that the 25 letters had been submitted on 28 October and Duncan Smith voted out the following evening.
There are a number of possible candidates that could stand against May if a leadership contest were to take place.
Dominic Raab is the bookies’ favourite after standing down as Brexit Minister on 15 November, whilst, Sajid Javid, Boris Johnson and Michael Gove are all thought to be contenders.