The British government states it has secured "legally binding changes" from the E.U.to address concerns about the border between Ireland and British-controlled Northern Ireland - a main factor in the rejection of the deal earlier this year.
Labour's Yvette Cooper, one of the key players behind parliamentary moves to stop no deal, has said she and a cross-party group of MPs would consider steps to force those indicative votes as an amendment to any motion for an extension to article 50.
It is likely to turn wavering Tory Brexiteers, who had been awaiting Cox's judgment on the concessions, back against May's deal in large numbers.
The problem continues to revolve around the controversial Irish backstop - the safeguard against a hard border on the island of Ireland.
"Whenever there is any update to Brexit negotiations or parliamentary votes, we see a spike in support requests as customers try to understand what it all means for the pound and our Brexit Support Desk will be anticipating lots of queries today and tomorrow once the results are known".
However, "the legal risk remains unchanged" that Britain, without being able to prove bad faith on behalf of the European Union, would have no legal means of exiting the backstop without the agreement of Brussels.
She said the new agreement - or "instrument" - could be used to start a formal dispute against the European Union if it tries to keep the United Kingdom tied to the backstop.
"MPs were clear that legal changes were needed to the backstop".
The pound sterling has soared to its highest figure in almost two years after Prime Minister Theresa May struck a Brexit breakthrough.
"There will be a specific negotiating track on alternative arrangements from the very start of the next phase of negotiations", May promised.
MPs are due to vote on May's deal on Tuesday night.
Mr Juncker added: 'We reached an agreement last night with the British Government on the terms of Brexit, and I said yesterday evening - or anyway during the night - that it was a second chance, but there wouldn't be a third chance.
"It is this deal or Brexit might not happen at all".
However, a substantial defeat for the prime minister was likely to push sterling lower, he said. These publications need careful analysis.
In a statement the DUP said it would scrutinise the text from Mrs May's meeting "line by line".
"We will measure this latest text against the Brady amendment and the commitments made by the prime minister on 29 January".