It looks to me as though the Prime Minister has been mugging up on the philosophy of the former US President with whom he shares a surname. It was Lyndon Johnson who said that the first rule of politics is to learn to count. While it’s still early days, there are strong signs that Johnson’s new proposal is pulling MPs in one by one from the Brexit extremities and onto the centre ground.

As we know from Theresa May’s failure three times to get her Withdrawal Agreement through the Commons, Brexit is ultimately a numbers game. The DUP’s Arlene Foster has given the thumbs-up to Johnson’s plan, which allows Northern Ireland to leave the EU’s customs union along with the rest of the UK but remain signed up to the bloc’s single market rules indefinitely. That’s 10 votes.