Out-of-work families could be £723 worse off next year compared to 2010.
The claim comes after Esther McVey, the work and pensions secretary, admitted last week families will be “worse off” under the new system.
Spike in demand is 'more grim evidence of how near so many children are to destitution.'
Some party members want whip withdrawn as a punishment
Costs spiral, delays mount - as the roll-out continues.
Campaigners say it is time to 'finally see an end to the highly damaging sanctions regime'.
Damning report says disability reassessments are destroying public trust.
Former finance director forced to deny he was 'asleep at the wheel' at gruelling Commons inquiry.
'It is the biggest injustice in the world today.'
The DWP secretary has taken to Twitter to defend Universal Credit roll-out.