Nerves are jangling among Britain’s Jews as a Savanta ComRes survey put the Conservative lead at just five points, an apparent switch in momentum which could lead to a hung Parliament and Jeremy Corbyn forming a government.

Barrister Jeremy Brier tweeted: “Tonight I put my 3 Jewish children to bed, knowing that tomorrow this amazing country could elect an antisemitic PM, the leader of an institutionally antisemitic party.

“It’s the worst I’ve ever felt about an Election in my lifetime. Whatever you do tomorrow: #NeverCorbyn.”

Writer Jamie Susskind wrote: “Like a lot of British Jews, I feel only anxiety about what happens today.”

The Savanta ComRes poll, carried out for the Telegraph on Wednesday, put the Tories on 41 per cent ahead, of Labour on 36 per cent, the smallest Tory lead since mid-October.

Although another poll put the Tory lead as high as 12 points – which would translate into a solid majority – there were warnings from a range of commentators that this is the most volatile election in living memory.

Reports of bad weather in marginal constituencies such as Dudley north have led to concerns about voter turnout and warnings about making any confident predictions about the result.