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Tory ministers yesterday called George Osborne “bonkers” for backing plans to make them publish their ­personal tax returns.

The Chancellor revealed in an interview that he was “very happy” to consider the idea.

But the move could spark ministerial resignations if it goes ahead, Cabinet sources warned.

The row erupted after Boris Johnson and his London mayor rival, Labour’s Ken Livingstone, disclosed their incomes in their fight to run the city.

Osborne said: “My personal principle has been makethe rules in general more ­transparent.”

But a Cabinet source called the plans “bonkers”, adding: “I can think of a number of senior ministers who’d rather quit than go along with this.”

Former Tory cabinet ­minister John Redwood said it would “put good potential ­candidates off”.

Labour said they would also reveal details if the Tories ­followed up the plan.

A spokesman said: “We’ll look at any proposals and match anything the Government actually does.

“The real issue is ministers coming clean about whether they benefit from the tax cut for millionaires introducedby George Osborne in his Budget.

“When they have decided to spend billions giving a tax break to 14,000 millionaires, the least the members of the Cabinet can do is tell us if they are one of the tiny number of people who benefited.”