More than 3.000 savers last year were paid roughly £600 by Premium Bond provider National Savings and Investments (NS&I).
According to the provider's annual accounts, the mistake set them back around £2 million. While some savers could have received more than £600 and some could have received less, this is still the average payment made.
It comes after the NS&I paid a higher interest rate to people who had Guaranteed Growth Bonds and Guaranteed Income bonds before they needed to. The interest rate change was implemented on October 26, 2022 when it should have been on December 1.
