Research showed that any attempt by Jeremy Corbyn‘s MPs at Westminster to frustrate the departure from the EU would lead to Labour candidates facing defeat in 19 of its 25 most marginal constituencies held by the party.

The survey, carried out by the polling firm IQR for the Brexit-supporting pressure group Global Britain comes on the eve of the start of the Labour conference in Liverpool, where delegates are expected to vote on calls for the party to back a second EU referendum.