Starmer feels the effects of setting high standards for his party in opposition

Despite pledges to run a squeaky clean administration the prime minister and some in his cabinet have been caught out

There is a theory in British politics, often attributed to Tony Blair, that you need to be careful about throwing a boomerang in opposition, because when you make it to power it could come back and hit you in the face.

As opposition leader, Keir Starmer became adept at landing blows on the Conservatives. Over the Partygate scandal in particular, he called for Boris Johnson to quit over his rule-breaking. You cannot be a lawmaker and a lawbreaker and it's time to pack his bags," he said.