Monday - Day four of MPs' Brexit debate, with the PM set to make a statement to the Commons setting out reassurances from the EU over the Irish backstop
Tuesday - Day five of debate followed by "meaningful vote" on the PM's deal. MPs will also get to vote on amendments that could reshape the deal. If the deal is rejected Theresa May will get three working days to come up with a "plan B"
Wednesday - Mrs May is likely to head to Brussels to try to get further concessions from the EU
Monday 21 January - Expected Commons vote on "Plan B"
The UK will leave the EU on Friday, 29 March, unless MPs vote to delay or cancel Brexit.