Britain's Brexit Secretary David Davis has been forced to row back on claims MPs may only be given a vote on the deal pulling Britain out of the European Union after the UK had quit.
Mr Davis said he expected negotiations to go on until the last minute of the final day before the UK leaves and Parliament would not get a say until the agreement was secured.
British Prime Minister Theresa May later appeared to contradict Mr Davis, telling MPs she was "confident" a deal would be secured in time for it to go before MPs.
Officials in the Department for Exiting the European Union then issued a statement clarifying the Brexit Secretary's comments.
A spokesman for Mr Davis said: "We are working to reach an agreement on the final deal in good time before we leave the EU in March 2019".
"Once the deal is agreed we will meet our long-standing commitment to a vote in both Houses and we expect and intend this to be before the vote in the European Parliament and therefore before we leave.
"This morning the Secretary of State was asked about hypothetical scenarios. Michel Barnier has said he hopes to get the deal agreed by October 2018 and that is our aim as well."
Earlier, David Davis was accused of breaching a commitment made by a minister that MPs would be given a vote on a deal "before it is concluded".
Labour former shadow business secretary Chuka Umunna said, in light of Mr Davis's comments, a debate in February, in which the then-Brexit minister David Jones claimed the deal would be put before MPs, was "at best contradiction and at worst false impression".
As he gave evidence to the Commons Exiting the EU Committee, Mr Davis said he expected negotiations to go on until the last minute of the final day before the UK leaves and parliament would not get a vote until the agreement was secured.
But raising a point of order in the Commons, Mr Umunna said: "The Minister of State for Exiting the European Union gave a commitment in this House that this House of Commons would have a vote on the arrangements of our withdrawal from the European Union before our exit from the European Union.
"Now this morning, the Secretary of State for Exiting the European Union told the relevant select committee that that vote that the minister committed to happening before we leave could indeed actually happen after we leave the European Union, and as such that is in clear breach of the commitment given by his own minister that it will be a choice between leaving the European Union with a negotiated deal or not.
"Obviously we won't have that choice if we've already left the European Union by the time of a vote."
Mr Umunna said it seemed that the Commons "cannot take back control unless we have that vote" as he asked Speaker John Bercow to advise "on what we as a House of Commons do about that, at best contradiction and at worst false impression, given to the House during that debate."
Mr Bercow said there would be "lots of opportunities... here in Parliament and doubtless outside as well to press his case".
Labour former shadow minister Seema Malhotra asked that if there had been a change in government position it be brought before the House in a ministerial statement.
Mr Bercow replied: "If there is a material change in Government policy or intended practice on a very significant matter, it is customary that there should be a statement to the House - it wouldn't always be an oral statement, but it might very well be an oral statement, and the House knows very well that there are means by which to secure the attendance in the chamber of a minister if such a statement is not proffered."
Tory backbencher Christopher Chope claimed Mr Umunna had "misunderstood the situation".
He said Mr Davis had made a "perfectly sensible point", and in a point of order added: "The question that the Secretary of State had was whether or not he thought that there would be an agreement before midnight on 29 March 2019 - and he indicated that he thought it might be a nanosecond before midnight on that day.
"And he was then asked whether that meant that this House would not be able to vote on such an agreement until after 29 March and he said obviously it won't be able to vote on an agreement after 29 March if there hasn't been an agreement until 29 March."
DUP MP Sammy Wilson said it seemed that "different members of the committee heard different things from the Secretary of State" and suggested it would be better to wait until a record of the meeting was published "because I did not hear what the members have alleged to have heard".
Mr Bercow said there would be a transcript published which "will then be subject to the beady eyes of colleagues on both sides of the chamber and on both sides - if I can put it that way - of the Brexit argument and they will read into it what they wish and pursue their cause as they choose".