YOUTUBE•GETTY One of David Cameron's biggest donors Edi Truell has cancelled his donation

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Edi Truell, who has donated more than £270,000 since 2010, is also reportedly considering quitting the Tory party altogether after Mr Cameron’s “unfair” scaremongering about a Brexit. The pensions expert said he will only hand over his money to the party again if Boris Johnson or Michael Gove take over after June 23.

GETTY Mr Truell said Cameron's Brexit claims are 'irresponsible'

I'm not prepared to support the current regime given the way they have been going about things Edi Truell

Mr Truell has already written to the party chairman Lord Feldman vent his fury at the way “the machinery of Government is being abused” by the Remain campaign. He said: “I think Boris, Michael Gove and team have done a sterling job, a brave job, and I would be only too pleased to support them and, in my view, the genuine Conservative party in the future. "I'm not prepared to support the current regime given the way they have been going about things."

The donor and previous trustee of the Tory party pension fund said he is “staggered” by fears spouted out by Cameron and George Osborne about financial risks of Brexit, calling the numbers “fantasy”. Other Tory donors are also said to be considering pulling their financial support because of the Remain campaign. Mr Truell added: “The much greater risk is remaining within the EU, they've got explicit plans to destroy British pensions.

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"All the final salary funds will go bankrupt and their companies will go bankrupt supporting them, that's about 8,000 pension funds in the private sector." The hammer blow comes as former foreign secretary John Nott suspended his own membership from the Tory party because of "poisonous" David Cameron's "tirade of fear" against a Brexit.

GETTY The pensions expert said he will donate to the party if Michael Gove or Boris Johnson take over