It comes after Mr Cameron faced weeks of embarrassment over his efforts to lobby for Covid support of the supply chain financing firm Greensill Capital. Mr Cameron did not respond to a request for comment last night. Mr Cameron first made the pledge Conservative policy during his 'hug a husky' period – when he was trying to increase the party's electoral appeal by 'detoxing' its image and associating himself with more compassionate and pro-Green policies. Now allies of Mr Johnson (pictured in 2019) claim that Mr Cameron has also been urging MPs to vote against Mr Johnson on the issueHe said: 'We are cautiously optimistic that we have enough votes. With Tony Blair and Gordon Brown also voicing their objection to the move, Mr Johnson is facing the opposition of all five living former Prime Ministers.