Hit London banks with windfall tax up to £60bn to cut energy bills for less well off, Andy Burnham union ally urges

But shadow Chancellor Sir Mel Stride warns: ‘Labour need to realise that you can’t tax your way to prosperity’

Hit London banks with windfall tax up to £60bn to cut energy bills for less well off, Andy Burnham union ally urges

But shadow Chancellor Sir Mel Stride warns: ‘Labour need to realise that you can’t tax your way to prosperity’