Half of UK wants to rejoin EU and backing it could drive up Labour vote, megapoll finds

Exclusive: Findings will bolster those in No 10 who want to negotiate on re-entry but some senior figures remain wary

Andy Burnham's personal preference to rejoin the European Union after the next election is supported by almost half of all voters, a new megapoll has found, although cabinet ministers concerned about reopening Brexit divides are privately urging him to proceed with caution.

The poll by the Messina Group (TMG) found that renegotiating the UK's relationship with the EU could boost Labour's vote share by as much as seven points, if the prime minister offered a fresh referendum in which he campaigned to re-enter the bloc.