Keir Starmer is facing a benefits showdown with his own MPs within weeks as they vow to block reforms despite spiralling costs.
A crunch vote on the government's new welfare legislation - seen as a test of strength for the PM - has been slated for July 1.
Sir Keir has insisted he will not bow to pressure to water down the curbs on sickness and disability benefits, despite massive pressure.
They are intended to save around £4billion on working age handouts by the end of this Parliament, although grim trends in claims mean costs are still expected to increase by £11billion.
Leader of the Commons Lucy Powell told MPs this morning that the second reading of the Universal Credit and Personal Independence Payment Bill will be on July 1. That is the moment when politicians vote on the broad principles of the legislation, although many rebels might opt to keep their powder dry until later in the process.
