Theresa May’s decision not to put her name to the deal with the Democratic Unionist Party will mean that a new agreement will not be necessary if she quits, sources say.

The Prime Minister said she would agree a deal with the DUP’s 10 MPs outside 10 Downing Street hours after she failed to win a Commons majority in the general election.

However when the "confidence and supply" deal was agreed in 10 Downing Street, the agreement was signed by the Government chief whip Gavin Williamson, and the DUP’s chief whip Sir Jeffrey Donaldson.

This left the Prime Minister having to stand at the back, appearing to some like a witness at a signing ceremony in a council marriage registry office.