The government’s compromise to avoid a Commons defeat on Brexit has been rejected as “unacceptable” by leading rebel Dominic Grieve.
Theresa May had convinced most rebels – who want MPs to have the final say – to back her in a key vote on Tuesday night by giving them assurances.
But the wording of the promised compromise has now been published.
Mr Grieve, who had talks on Thursday with ministers, said he could not understand why the change was made.
BBC political editor Laura Kuenssberg said Remain-leaning Tory MPs were furious and it set the scene for another big showdown when the bill returns to Parliament next week.
Mr Grieve said he had been involved in talks for two days and: “at the end of the process something was inexplicably changed, which had not been agreed.
“The government has made the motion unamendable, contrary to the usual methods of the House of Commons. And therefore it cannot be accepted.”
Asked what he would do next, on BBC One’s Question Time, he said: “I think a group of us will talk further to the government and try to resolve it.”
He said he would listen to the government but added: “I hope they listen to me when I say I don’t understand why you’ve done this last-minute switch.”
He said the problem was that if the UK reached “the…