No 10 will push for an election if MPs rule out passing the bill in three days and the EU grants a Brexit delay.
A lawyer for Shamima Begum says stripping her citizenship left her stateless and should be reversed.
Twenty-two people were killed and hundreds were injured in the Manchester bombing in 2017.
The original plan had been to shut the "most dilapidated" jails and sell the sites for housing.
Four years after the bombing of a Russian plane, the UK says airport security at the resort is safe.