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More than twice as many people say the public rather than MPs should decide whether Britain quits the EU if Boris Johnson fails to get a new Brexit deal, according to a poll.

The YouGov survey showed 52 per cent believe this final decision should be made in another referendum, compared with 23 per cent who think it should be taken by MPs in Parliament, with 25 per cent saying “don’t know”.

If the Prime Minister does strike a new Brexit agreement with the EU, 47 per cent of people still favour the final decision between leaving on the agreed terms or staying being left to the public in another vote rather than to MPs, 29 per cent. Offered the choice over which is the better way of solving Brexit, 40 per cent said a new referendum and 25 per cent a general election, according to the poll for the People’s Vote campaign.

With more MPs also giving their support for a second referendum, Peter Kellner, ex-president of YouGov, said: “It is clear that the public mood is hardening in favour of a People’s Vote to decide whether Brexit should go ahead.

“Not surprisingly, Remain voters are keen on a referendum but so are large numbers of Leave voters.

“By a clear 41 to 27 per cent margin, Leave voters want a referendum, rather than MPs, to settle the matter if there is no deal.”

YouGov interviewed 1,620 adults in Britain between September 29 and 30. Data are weighted.