Boris Johnson (pictured) is at risk of losing his seat, a study has argued

Boris Johnson is at risk of losing his seat in the next general election amid a surge of younger voters, a study has argued.

The former foreign secretary could be unseated from his Uxbridge and South Ruislip constituency due to a demographic shift.

The Generation Why? report by centre-Right think-tank Onward found that constituencies with ratios above 1:1 voters aged 20-39 for 60 pluses were likely to be won by parties other than the Tories.

'Some Conservative seats have ratios far higher that the tipping point, suggesting they are vulnerable,' it reads.

'Conservative seats with high ratios include the London seats of Cities of London and Westminster, Hendon, Chelsea and Fulham, and Uxbridge and South Ruislip.'

It also found that every generation and ethnic group, including Remain supporters, back curbs on immigration.

The policy is supported by 38 per cent of 18-24 year-olds, 68 per cent of over-65s, 40 per cent of Asian voters, 45 per cent of Black voters and 40 per cent of Remain voters.

Only 16 per cent of under-35s said they would currently vote for the Conservatives. Just 17 per cent of Tory voters are aged under 45, and only 4 per cent are under 25.

The age at which people become more likely to vote Conservative than Labour is now 51, up from 47 at the 2017 election and 34 before that.

It comes after claims that Jeremy Corbyn is set to take power due to Theresa May's failure to deliver Brexit by March 29.

A general election would see the Conservative Party losing 59 seats, meaning Mr Corbyn's party would be left the largest in the House of Commons, a Sunday Telegraph poll of polls claimed.

President of the British Polling Council Professor Sir John Curtice said Brexiteers had been 'drawn back to either Ukip or Nigel Farage's newly launched Brexit Party'.