Matt Kelly, editor of The New European, revealed last week on Twitter that someone who knows Johnson very well said he now wishes he had "sent the other letter".
The source said: “He knows he’s fucked up massively. Now he’s working out how to get himself out of the mess.”
I guess that the person who knows Johnson very well but is also clearly a Remainer would be Boris' brother , Jo , who is one of the MPs backing the Benn ammendment I mentioned earlier today .