The government and key-Brexit supporters face a crucial week, with a series of important Brexit votes scheduled for next Tuesday.
Chief whip Julian Smith confirmed to Tory MPs a marathon debate would be held next Tuesday and warned votes could go on long into the night.
MPs are expected to be ordered to strike down all 15 changes made by peers to the EU Withdrawal Bill.
But at least two of the amendments – on whether Mrs May can quit talks without a deal and on keeping Britain inside the European Economic Area – could attract enough Tory rebels to inflict embarrassing defeats on the Government.
The 15 Brexit Bill defeats inflicted by the House of Lords:
- Forces minsters to try to seek a customs union with the EU
- Keeps EU law relating to employment, consumer and environmental protections
- Keeps the EU Charter of Fundamental Rights
- Removes right of ministers to challenge EU law kept by the UK
- Allows Britons to bring legal cases when their rights, enshrined in EU law, are flouted
- Limits the scope of the Government’s so-called Henry VII powers
- Gives Parliament a meaningful vote at the end of talks
- Gives parliament a veto on the Government’s negotiating position
- Ministers must report on what they are doing to ensure refugee families reunited within Europe
- Ministers must abide by 1998 Good Friday Agreement
- Reaffirms that the UK can keep EU laws and stay in EU agencies
- Gives parliament a veto on the exit day
- Ministers must try to keep the UK in the EEA and therefore the EU single market
- Extends how EU laws will be trawled through by Parliament
- Enshrines EU environmental protections