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Conservative MP for Mansfield Ben Bradley is the 20th MP to have made his letter public. Bookies have suspended the odds on the year Theresa May will leave office, amid speculation the Prime Minister will face a no confidence vote. Sources claim the 1922 Committee has received the 48 letters needed to trigger a vote of no confidence in Mrs May.

A leadership challenge is triggered if 48 or 15 percent of Conservative members write letters to the chairman of the 1922 Committee, which represents those lawmakers who have no Government jobs. MPs have publicly said they have submitted such letters in protest at her Brexit negotiating strategy which she presented to the House of Commons on Thursday. 1922 Committee chairman Graham Brady, is the only person to know how many letters have been submitted. Once 48 letters have been submitted, he is obliged to notify the executive of the Committee and Downing Street.

No confidence vote: Theresa May could face a vote of no confidence by the government

What time is the no confidence vote? After 48 letters are submitted to the 1922 Committee then a vote can be held as soon as reasonably possible. However a time or date has not yet been confirmed, as it is not clear if the chairman has received the 48 letters needed for a no confidence vote. The date of the vote is decided by the chairman, Sir Graham in consultation with Mrs May. The last no-confidence vote against a Conservative MP was when the party was in opposition in 2003.

No confidence vote: A leadership challenge is triggered if 48 letters are submitted

Mark Francois, vice chairman of the pro-Brexit European Research Group of Conservative MPs, told Sky News the reasons why he had submitted his letter. He said: “I have done it because I believe Conservative MPs are extremely worried by the Chequers deal. “I believe they know it will never pass the House of Commons. I am afraid the Prime Minister is an in complete denial about that. Things have come to a point where we have to stand up for our country.” Former Cabinet minister John Whittingdale submitted his letter in Friday.

No confidence vote: Jacob Rees-Mogg is one of the MPs to have submitted a letter