Labour faces ‘mass challenge’ over Brexit policy

Thousands of members demand second referendum as poll reveals party’s share of vote would plunge if it backed exit dealThousands of Labour members have demanded their party oppose Theresa May’s Brexit deal and back a second referendum over EU membership. The call comes before a key party gathering which will be held amid warnings that some are already ending their membership over the issue.The pressure emerges as the biggest Brexit poll conducted since the referendum suggests support