We have reported previously on the historical underpayment of State Pension due to errors by DWP affecting some pensioners who are married, widowed or over-80, most recently when we examined DWP’s 2021–22 Annual Report & Accounts. During that inquiry DWP told us it estimated that 237,000 pensioners had been underpaid around £1.46 billion due to human error going back decades.25 DWP’s best estimate is now that 165,000 people have been underpaid a total of £1.2 billion.26 This remans in line with the range of uncertainty that DWP previously set out.27