General election 2017: Jeremy Corbyn's constituency visits 'increased Labour turnout at polls', study suggests

A personal visit by Jeremy Corbyn was crucial in delivering victory for Labour in key seats during the election, new research suggests.

In contrast, an appearance by Theresa May made no difference when the votes were counted in the constituencies where she campaigned.

The seats where the Labour leader campaigned saw an average swing of 19 percentage points in his party’s favour, a study by the London School of Economics (LSE) concluded.

That leap was almost twice the 9.8 per cent swing to Labour recorded in the constituencies that Mr Corbyn did not visit in the run-up to 8 June election.

Meanwhile, the LSE found that an appearance by the Prime Minister had no impact on the eventual result.

In fact, the Conservatives achieved a marginally higher swing of 5.9 per cent in seats she did not visit, compared with the 5.8 per cent in the seats she did.

The research found that both Ms May and Mr Corbyn – with 73 and 70 public visits respectively – made around 17 more campaign appearances than their counterparts in 2010.

A previous analysis found that Ms May’s plans to target Labour constituencies backfired in June, with the Tories losing almost all of the seats she visited on her tour.

During the campaign, Mr Corbyn took a different approach and was accused of spending most of his campaign shoring up support in safe Labour seats