London mansion tax bombshell as Healey 'considers lowering threshold to £1.5m' hitting thousands in capital London Evening Standard Labour considers lowering mansion tax threshold to £1.5m The Times Four boroughs fight back against unfair property tax Wandsworth Borough Council Britain's Labour government considers lowering mansion tax threshold to £1.5 million, The Times reports reuters.com Labour ‘considers extending mansion tax’ to homes worth more than £1.5m lbc.co.uk