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David Davis has called on Boris Johnson to resign, in an extraordinary piece of political theatre in the Commons.

“I expect my leaders to shoulder the responsibility for the actions they take,” the former Brexit secretary and MP of 34 years told a hushed chamber at PMQs. “Yesterday [the PM] did the opposite of that. So I’ll remind him of a quotation altogether too familiar to him of Leo Amery to Neville Chamberlain: ‘You have sat there too long for all the good you have done. In the name of God, go.’”

The room erupted. The Prime Minister was stunned. His Cabinet colleagues sat there in silence as Boris blathered a response.

Davis, who said he had spent weeks defending the Prime Minister from angry constituents, is the most senior Tory yet to demand Johnson’s resignation. It’s a sign that the dynamic within the Tory party really is shifting against Johnson.

As MPs trickled out of the chamber, the Commons microphone picked up Speaker Lyndsay Hoyle’s muttered summary of what he had just witnessed: “What. A. Day”.