The PM's deal has been endorsed by EU leaders but must also be backed by the UK Parliament if it is to come into force. MPs will decide whether to reject or accept it next Tuesday, 11 December.
The UK is due to leave the European Union on 29 March, 2019. Ministers say that if MPs reject their deal they increase the chances of the UK leaving without a deal, or not leaving the EU at all.
There is a risk MPs could "steal Brexit from the British people" if Theresa May's proposed deal is rejected, a senior cabinet minister has warned. Liam Fox said there was "natural Remain majority" in Parliament and any attempt to overturn the 2016 referendum vote would be a "democratic affront". It came after MPs voted to exert more influence should the PM's deal fall. Ministers will again battle to win over MPs to Theresa May's withdrawal deal after three government defeats.