Conservative sympathisers, Conservative voters and Conservative parliamentarians have a simple choice to make this week. Do they stand by a Prime Minister who besmirches his office and whose moral credibility diminishes a little more each day he remains, squatting, in Downing Street? Or do they, instead, accept the obvious reality that Johnson is not fit for the office he holds, draw the obvious conclusions from that recognition, and do the decent thing?

For every Tory MP and cabinet minister who fails to act this week deserves to be judged themselves.