15:01

Grieve is now talking about the Davis compromise statement (see 1.53pm), which he says will be tabled as written ministerial statement tomorrow.

He says this confirms that it will be up to the speaker to decide whether a motion can be amended.

And he reads out the final paragraph, saying “as is the convention”, the Commons can hold debates and votes.

Labour’s Chris Bryant intervenes. He says in recent years the government has often ignored Commons votes. The only thing with legislative effect is legislation. That is why there must be a meaningful vote.

Grieve says the government could ignore an amendment as voted on under the Lords amendment. That could be not enforced in law, he says. It would have to be enforced by the Commons itself - by a confidence motion or other means.

He says he has considered what the PM has told him about her anxieties. His own judgement is that he should “accept the government’s difficulty and support it”, he says.

Leading Tory rebel Dominic Grieve says he accepts government’s compromise and will back government. That means Theresa May is now on course to win the vote.

Grieve says, if MPs want a vote on his amendment, he will allow one. But he will not be voting for it any more, he says.

He ends with a final point. He says there is enough “madness” around to make him wonder whether “collective sanity” has been destroyed.

And bullying is making it worse, he says. He says people are afraid of backing down in case someone says they have lost.

(I’ve got to finish now. I’m handing over to my colleague Jessica Elgot.)