Four Merseyside MPs, and Liverpool Mayor Joe Anderson, signed an open letter demanding a referendum on the final Brexit deal with Brussels last week.
Five Labour MPs from the North East called for one earlier this month. Although shadow Northern Ireland secretary Owen Smith lost his job for backing a new vote, this hasn’t happened to other senior figures.
Preet Gill, shadow international development minister, tweeted that a vote on the final Brexit deal was “an absolute must”.
Deputy leader Tom Watson failed to rule out such a vote last weekend.
James Cleverly, Conservative Party deputy chairman, said the fact top Labour politicians did not accept the poll result proved “they would take us back to square one”.
He added: “It shows once again how Labour are only interested in frustrating the Brexit process.”
Theresa May’s Tories analysed speeches, interviews and online posts by senior Labour figures to gauge demand for a new vote.
They found that a push by the rival party to back a second referendum was also picking up pace.