Here is a likely timetable for the passage through Parliament of the European Union (Notification of Withdrawal) Bill, known informally as the Article 50 Bill:

:: January 31: The House of Commons begins two days of debating the Bill. Speaker John Bercow will select which amendments, if any, are debated at this stage.

:: February 1: MPs will get to vote on the Bill at the end of the debate. The vote is expected to take place late in the evening. If passed, the Bill moves to the committee stage for further scrutiny.

:: February 6-7: Committee stage. MPs can try to revise the Bill by pushing through a series of amendments.

:: February 8: End of the committee stage. MPs will get another chance to debate the Bill, followed by a final vote. If the Bill is passed, it will be sent to the House of Lords.

:: February 9: Parliament rises for February recess.

:: February 20: Parliament returns from recess. The House of Lords is likely to begin debating the Bill.

:: Late February/early March: The House of Lords debates the Bill. If peers vote to amend the Bill, it will return to the House of Commons. If there are no amendments, the Bill is sent to the Queen to receive Royal Assent and become law.

:: March 9-10: EU summit in Brussels. If the Bill is now law, Theresa May could use this occasion to formally trigger Article 50 and start the two-year countdown to the UK leaving the European Union.

:: By March 31: Theresa May has said Article 50 will be triggered.