Boris Johnson criticised the prime minister yesterday for his “corrosive” failure to reduce net migration

David Cameron is to reject demands from Tory rebels that he should set a date for his departure from No 10.

The prime minister will dare backbenchers to carry out a threat to depose him in the wake of the European Union referendum that has split his party.

Conservative MPs backing the Leave campaign broke cover yesterday to call for a vote of no confidence regardless of the result. They accused Mr Cameron of telling “outright lies” and said that his future in office was untenable.

The party’s civil war threatens to effectively put his leadership on the ballot paper on June 23.

Nadine Dorries, MP for Mid Bedfordshire, said that the prime minister would be “toast” within days of the referendum unless Remain polled