At least four ministers are ready to follow David Davis in resigning over Brexit Mary Turner;/Reuters

David Davis today calls for a cabinet uprising against Theresa May over Brexit — as MPs and ministers said they are ready to oust her if she does not change course.

The former Brexit secretary accuses the prime minister of pressing ahead with a “flawed” plan to keep Britain in a customs union, a proposal he brands “completely unacceptable”.

Writing in The Sunday Times, he accuses the prime minister’s aides of “incipient panic” in the face of Brussels’s demands and wrongly trying to cut out the cabinet from the key decisions.

Demanding an insurrection by May’s top team, he writes: “This is one of the most fundamental decisions that government has taken in modern times. It is time for the cabinet to exert their collective…