Theresa May has said she will not remain in post for the next phase of Brexit negotiations.
The prime minister's offer to step down after her withdrawal agreement is passed came in response to calls from a number of her backbenchers for her to name the date of her departure in return for their help in pushing the deal through Parliament.
Mrs May spoke to the Conservative 1922 Committee shortly before MPs were due to take part in "indicative votes" on a range of Brexit options in the House of Commons.
She said she "will not stand in the way" of the party having new leadership, telling the 1922: "I am prepared to leave this job earlier than I intended in order to do what is right for our country and our party."
Earlier, Mrs May moved to prevent possible ministerial resignations by allowing Conservative MPs a free vote on the indicative votes.
But the Prime Minister herself, along with her Cabinet ministers, will abstain in the "indicative votes", whips have indicated.
Following reports of Mrs May's message to Tory MPs, Anna Soubry tweeted: "So hard Brexiteers will vote for the PMs "deal" not because it's good for our country and the right thing to do - not even because it delivers Brexit but because it gets rid of the PM #Shameful."