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 number of men and women who are eligible to inherit a deceased partner's Additional State Pension but who have yet to make a claim to do so.

No estimation has been made. Under current rules, State Pension recipients who become widowed do not need to make a separate claim to get any inherited additional State Pension they may be entitled to. Similarly, those widowed before State Pension age should receive any inherited additional State Pension they may be entitled to when they claim their State Pension.