Hundreds of thousands of pensioners could be due substantial payouts following a series of administrative errors that have left them financially disadvantaged for years. The Department for Work and Pensions (DWP) has acknowledged that over 130,000 people have been underpaid, with £800 million set aside so far for reimbursements.

However, the total cost could exceed £1 billion, with the rectification process not expected to conclude until at least March 2027.

Former pensions minister Sir Steve Webb, now a partner at consultancy LCP, warned: "This is one of the biggest correction exercises in the history of the State Pension. Yet many who are due money will not be aware of it unless they take action."

The errors primarily relate to the Home Responsibilities Protection (HRP) scheme, which

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