The UK Chancellor has said his government has 'no red lines' in their talks aiming to find a Brexit compromise with Labour.
Philip Hammond was speaking as he arrived at an informal meeting of EU finance ministers in Bucharest this morning.
Back in London, efforts are continuing to break the Brexit impasse.
Talks between the British government and the main opposition parties began earlier this week after a surprise shift in Theresa May's Brexit strategy.
They've been attempting to reach an agreement that could win the support of a majority in parliament.
Efforts appeared to be stalling yesterday evening after Labour said they were "disappointed that the government has not offered real change or compromise".
A party spokesperson said: "We urge the Prime Minister to come forward with genuine changes to her deal in an effort to find an alternative that can win support in Parliament and bring the country together."
However, Mr Hammond insisted the talks are still ongoing.
He observed: "The conversations with the Labour party are continuing - they were continuing last night, and we're expecting to exchange some more text with the Labour party today.
"This is an ongoing process, and I'm optimistic we will reach some form of agreement with Labour."
Quizzed about the possibility of a second referendum, Mr Hammond said his government "should be open to listen to suggestions that others have made".
He suggested: "Our approach to these discussions with Labour is that we have no red lines.
"We'll go into these talks with an open mind, and discuss everything with them in a constructive fashion."
With only days to go until the latest Brexit deadline of April 12th, EU leaders will meet on Wednesday to consider the latest developments - including Mrs May's request for a further extension to the Brexit process.
Before that meeting, the EU's chief Brexit negotiator Michel Barnier and his team are due in Dublin on Monday.
He is set to meet with the Taoiseach and other senior ministers to "take stock" of the latest developments in London.