The Department for Work and Pensions (DWP) has been working over the past three years to rectify historic state pension underpayments.

The department is on track to resolve the issue by year’s end, having made thousands of back payments to those unjustly underpaid since the error was discovered in 2021.

So far, many of the 119,050 affected pensioners have received average payments between £2,202 and £11,905 depending on which category they fall into.

The main groups impacted by the system…