In stark contrast to a string of opinion polls that have suggested May’s Conservatives will increase their majority, the new constituency-by-constituency modelling by YouGov showed it might lose 20 of the 330 seats it holds and the opposition Labour Party could gain nearly 30 seats, The Times said.
That could leave the Conservatives 16 seats short of the overall majority of 326 needed to govern without the support of other parties, the newspaper said.
May surprised almost everyone in April when she called the snap election, saying she wanted to strengthen her hand for negotiations with the rest of the European Union about Britain’s exit from the bloc.
A failure to build on the working majority of 17 that the Conservatives won at the last election in 2015 – against a Labour Party led by radical left-winger Jeremy Corbyn – would be a major blow for May just as she embarks on the Brexit process.
A total of seven polls carried out over the past week have shown May’s lead over Labour narrowing, with some suggesting she might not win the landslide predicted just a month ago.
The lead started to contract sharply after she set out plans on May 18 to make some elderly people pay a greater share of their care costs, a proposal dubbed the “dementia tax” by opponents.
At the same time, Labour has gone on the attack for cuts to policing which have come into focus after last week’s suicide attack in Manchester that killed 22 people.
However, until now no poll has suggested that the Conservatives could lose their majority in parliament.
Sterling weakened against the US dollar after The Times report on Tuesday.
The newspaper, which publishes YouGov’s regular opinion polls, said the new election model was based on voting intention data collected over the past week which put support for the Conservatives at 42 per cent with Labour on 38 per cent, a narrower gap than any recent polls.
YouGov firm acknowledged that its predictions were controversial and that they suggested big swings in the usual voting patterns for many Britons.
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