Jeremy Corbyn has refused to endorse or campaign for a second vote on Brexit

Three quarters of Labour members want Jeremy Corbyn to back a second referendum on Brexit, as a survey shows that the Labour leader has suffered a marked drop in his support over the past eight months.

A YouGov poll of 1,034 Labour members, who pay annual subscriptions and can vote in leadership contests, found that 72 per cent supported a second referendum while 18 per cent did not. Six per cent said that they did not know.

The poll for Queen Mary University of London and Sussex University was conducted between December 17 and 21 as part of a project by the Economic and Social Research Council on party members. Labour has about 540,000 members, according to Commons figures compiled last spring, while the