Labour has insisted Brexit timetable plans must be made public by the end of January.
Shadow Brexit secretary Sir Keir Starmer also repeated calls for the House of Commons to be guaranteed a vote on the proposed terms for exiting the EU.
Sir Keir set out the demands in a letter to Brexit Secretary David Davis. The issue will be raised in the Commons on Thursday during questions on withdrawing from the EU.
The letter calls on Davis to provide an economic impact assessment, along with a detailed timetable of withdrawal.
The letter to Davis states: "Since the House of Commons will need time properly to scrutinise the plans and, no doubt, the House of Commons Brexit Select Committee along with the devolved administrations will want to do the same, I assume the plans will be made available no later than January 2017.
"Could you confirm that this will be the case or specify another date upon which the Government proposes to publish its plans?
"I can also confirm that Labour will be pressing for a vote in Government time in the House of Commons on its plans for exiting the EU.
"Time for a vote and full debate therefore also needs to be built into the Government's timetable; our economy, businesses and jobs depend upon it."