A former minister has raised concerns that certain state pension records might be deleted, rendering it "virtually impossible" to address historical payment mistakes.
Over recent years, several errors in state pension payments have emerged, with some affected people dying before the problems could be fixed.
Following someone's death, these mistakes can still potentially be put right, with any outstanding money transferred to their beneficiaries.
Sir Steve Webb, a former Liberal Democrat pensions minister, has contacted Sir Peter Schofield, the permanent secretary at the Department for Work and Pensions (DWP), calling on him to guarantee that records are preserved for as long as needed to tackle any remaining state pension errors.
A Freedom of Information (FOI) response obtained by Sir