Question to the Department for Work and Pensions:

To ask the Secretary of State for Work and Pensions, what estimate her Department has made of the effect of delaying managed migration of existing social security claimants to universal credit on the cost to the public purse of universal credit transitional protection; and whether those estimates constitute a saving to the public purse.

It is not possible to disaggregate the spending impact of delaying managed migration. HM Treasury did publish an overall spending impact of the budget changes, which can be accessed at:

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/752208/Budget_2018_policy_costings_PDF.pdf.