Jeremy Corbyn is facing more backlash from Labour MPs who are calling for a 'clear and unambiguous' position on Brexit.
The Labour leader said on Wednesday that an election or referendum is now the "only way out" of the crisis following mounting pressure on him to back a public vote.
Mr Corbyn said that going "back to the people" was now the only option when faced with the prospect of a no-deal Brexit and an incoming Tory prime minister "with no mandate".
But MP Stephen Doughty told Newsnight: “The words from Jeremy this evening are welcome but they don’t go far enough.
He said: "Labour will work with anyone across party boundaries and do whatever is necessary to stop a disastrous no-deal outcome, which would open the way for a frenzy of deregulation and a race to the bottom in jobs, rights and protections.
"But faced with the threat of no deal and a prime minister with no mandate, the only way out of the Brexit crisis ripping our country apart is now to go back to the people.
"Let the people decide the country's future, either in a general election or through a public vote on any deal agreed by parliament.
"For Labour any outcome has to work for our whole country, not just one side of this deliberately inflamed divide."
The Irish Times reported he told reporters in Dublin that a second referendum would not be a "re-run of 2016", but "would be on a negotiated deal or alternatives to that".
Asked if it would not be another "in-out" referendum, Mr Corbyn said: "It would be on the basis of whatever we have succeeded in negotiating."
Labour MP Bridget Phillipson, who supports a referendum, said Mr Corbyn was "at last beginning to listen to what our voters and members are saying" but there is "no immediate prospect of a general election" so the party should throw its weight behind the People's Vote campaign.
Meanwhile, deputy Labour leader Tom Watson said he would push for an all-member ballot to shift the party's Brexit policy.
Mr Watson, a supporter of the campaign for another referendum, carried out a survey of party members to see how they wanted to proceed - a ballot, a special conference or delaying until Labour's annual conference in September.
He said: "The results of my Brexit poll are clear. 84% of Labour members and supporters who took the survey want an all-member ballot to decide our party's Brexit policy.
"As deputy leader I'll support them to make this happen."
