Factbox - Britain's Brexit plan faces parliamentary test: what to expect

The government is most vulnerable over an amendment, introduced by the House of Lords to change the so-called "meaningful vote" on any final Brexit deal by handing the lower house more power to set the "direction" of the government if it rejects the agreement.The government opposes this amendment.This amendment would remove the legal date of Brexit - 29 March, 2019 - to let ministers change the date at the last minute if they don't have a deal.