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.

As for rent controls on private housing, many might assume there would be no cost to tenants, with landlords absorbing all of it themselves.

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.