As many as 100 MPs could be prepared to support a vote of no confidence in David Cameron if Britain votes to remain in the EU, Tory sources have claimed.

Backbenchers furious at the way Mr Cameron and his allies have conducted the referendum campaign are considering calling for him to go, even if he wins the June 23 vote by a significant margin.

Just 50 Tory MPs are needed to trigger a vote of no confidence in the leader.

Around 150 Conservative MPs are thought to back a Brexit, although a number of them have not publically stated their intentions.