"Do you think Heseltine is an inside job? I do. He's not undermining [Theresa May] at all, he's doing what she wants."
So comments a reader, and it makes sense to me.
If Heseltine were going to attack May at all, then it would be from her economic right.
Or possibly from the more realist and anti-interventionist foreign policy position that caused him to oppose the war in Iraq when she voted in favour of it.
But she does not want Brexit any more than he does.
From her point of view, the more difficult that he makes it, the better.