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Leading European Research Group Brexiteers have seen the mood in their constituencies swing dramatically away from Leave.

A new poll reveals almost every Cabinet member is now in a Remain seat.

And the findings by the Best for Britain campaign show even hardline leavers under pressure to change positions.

Jacob Rees-Mogg has seen the 47.9 per cent of Remainers in his Somerset North East seat in 2016 upped to a winning 53.8 per cent.

On Prime Minister Theresa May’s Maidenhead turf, constituents have swung from 54.6 per cent to 58.9 per cent in favour of staying despite her deal.

(Image: PA)

And the seats of key Cabinet members Michael Gove and Amber Rudd have switched away from Leave.

The figures show 422 of 623 UK constituencies now want to stay in the EU.

And 324 of 533 in England back Remain along with all Scottish seats and almost all of Wales.

Altogether, 193 constituencies have changed their mind since the 2016 referendum, according to the poll. Campaigners say it makes Theresa May’s job of selling her Brexit deal to the British people even more difficult.

Best for Britain chief Eloise Todd said: “The country is shifting in one direction. The PM is trying to strongarm MPs into backing the slim pickings of her deal. Our research shows people across the nation have decided we are better off with what we currently have.”

(Image: Getty)

Polling experts say the change is being driven by young Labour voters. In 2016 51 per cent were for Remain. That’s now 71 per cent.

Labour women have changed position too – with 68 per cent prepared to vote to stay compared to 49 per cent previously.

The research, carried out by Populous, was commissioned by pro-EU Best For Britain and HOPE Not Hate.

More than 8,000 people were polled.

HOPE not hate chief Nick Lowles, said: “The reality of Brexit is becoming clear.

"MPs must do what’s best for their constituents.” implementing Brexit is not that.”