General Election 2017: Bookies' odds on a Conservative overall majority start to lengthen

Caitlin Morrison
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Theresa May's chances of leading a majority are not looking so secure (Source: Getty)

Bookmaker Betfair has revealed odds on a Tory overall majority have started to lengthen.

This follows new polling data from YouGov which suggests the Conservatives could lose 30 seats in next week's election, bringing their total to 310 - 16 shy of the 326 required to hold a majority.

The same poll forecast a gain of 28 seats for Labour.

While a Conservative overall majority is still odds-on at 1/5 on Betfair Exchange, just one week ago it was 1/11. Odds on an outcome of no overall majority are now at 6/1, in from 13/1 a week ago.

For bets on the size of a Conservative majority, a 150-174 seat majority is "well-backed as the favourite", with odds going as low as 3/1. However, Betfair said, that is now out to 10/1, with 50-74 seats at 6/1 and 25-49 seats at 7/1.

Meanwhile, on the next Prime Minster market Theresa May is at the longest odds she has been since calling the election at 2/13, but still clearly ahead of Jeremy Corbyn who is at 13/2.

“Theresa May called this election with the aim of increasing the size of the Tory majority, so to actually lose their majority would be a monumental disaster," said Betfair spokesperson Katie Baylis.

"While punters on the Exchange are still backing a majority, there is certainly not as much backing for that as there was just a week or so ago."

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