Lord Andrew Adonis, who supports a second referendum, has said that any deal Theresa May offers the Labour leader “is not worth the paper it is written on”.
Talks between Labour and the prime minister seemed to stall after the party said Mrs May had refused to set out any changes to her Brexit red lines and no further face-to-face meetings have yet been confirmed.
Lord Adonis told talkRADIO’s Julia Hartley-Brewer: “The Jeremy Corbyn talks are not going to go anywhere – all it is going to do is further derail Theresa May.
“Labour has no incentive whatsoever to do a deal because if the deal goes through they do not want their fingerprints on it.”
He added: “Any deal Theresa May offers is not worth the paper it is written on.
“Mrs May is so terrified of putting anything on paper because knows she is going to have a massive argument with ERG members such as Jacob-Rees Mogg.”
Lord Adonis described Mrs May as a “prime minister in name only”.
The prime minister has requested a further extension until June 30, which the Labour peer described as “mind-boggling”.
“A three-month extension is crazy because for the people who want to leave on WTO rules the best thing to do is to leave now,” he said.
“For people like me, three months is not long enough to hold a referendum.
“She is so terrified of Jacob Rees-Mogg and Boris Johnson that she wants EU leaders to tell her that she should apply for longer.
“We are now expecting our European partners to do her job as prime minister and make a responsible and sensible proposal.”