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David Cameron thinks Michael Gove acted like a ‘lunatic’ during the EU Referendum campaign, it has been reported.

And the former Prime Minister blames the Environment Secretary, not Boris Johnson, for Brexit and the downfall of his own career.

Cameron is set to be “very honest” about his former colleagues in his forthcoming memoir, according to the Sunday Times

A source close to Cameron reportedly said: “He was saying Michael Gove was a lunatic.

"He said he had not realised quite how mad he was until that whole incident [Brexit].

“He was saying he feels even more cross with Gove than Boris.”

(Image: AFP)

Mr Cameron is reported to believe if Gove had not “mucked it up”, Boris Johnson would have gone head to head with George Osborne for the party leadership after his departure.

The ex-Tory leader was due to publish his memoirs this autumn, but has delayed their publication until next September, reportedly so his views on Brexit do not impact on Theresa May’s negotiations.