Andy Burnham should abandon his ambitions to return to Westminster amid fears Labour could lose both the mayoralty of Greater Manchester and a by-election, Cabinet ministers told The i Paper. Senior Labour strategists have been looking with dismay at last week’s local election results in Greater Manchester. Reform won every single ward up for election in Wigan, alongside 18 out of 19 seats in Tameside, with 50-point swings from Labour to Reform.…