The latest survey is the fifth national poll Labour has topped since Andy Burnham entered Downing Street, ending the run that saw Nigel Farage’s party lead in the polls for more than a year

The Mail's poll-of-polls puts Labour on 25 per cent, a point ahead of Nigel Farage's party in the week he contests a by-election in his Clacton constituency.

Voters will cast their ballots on Thursday in a race in which the former Ukip leader takes on Count Binface