Question to the Department for Work and Pensions:

To ask the Secretary of State for Work and Pensions, how many claimants of support for mortgage interest receive (a) Pension Credit, (b) income-based employment and support allowance and its equivalent in Universal Credit, (c) income-based jobseeker's allowance and (d) income support.

Information on caseloads for Support for Mortgage Interest (SMI) caseloads estimates is in table 3c here:

Benefit expenditure and caseload tables.