Sir Keir Starmer nad Rachel Reeves have already introduced a mansion tax, which may take effect as soon as April 2028. Burnham is reportedly thinking of lowering the threshold.

The former Greater Manchester mayor is almost certain to replace Keir Starmer in Downing Street on 20 July after returning to Parliament at the Makerfield by-election.

It won't be long before Burnham is this country's Prime Minister. Like me, I imagine you're not as titillated as Labour MPs are about the prospect of Burnham at the helm - and…