Following on from the intervention by my constituency neighbour, my right hon. Friend Sir Oliver Letwin, is it not the case that in any event, notwithstanding whatever is in the Bill, the Prime Minister would still retain the prerogative power? The Bill may seek that the Prime Minister asks for a certain date, but in fact there is nothing preventing her from adopting a parallel track or making a third request. Even if this Bill is passed unamended, which my right hon. Friend clearly does not want to happen, the Prime Minister could still chart her own course.