Dan Coatsworth, head of markets at AJ Bell, said: “NS&I effectively competes with the banks as a savings brand and is extremely popular with individuals up and down the country.
“News that thousands of bereaved families faced delays accessing their relatives’ Premium Bonds will be bruising for its reputation.
“Trust is incredibly important in financial services and savers might not look so fondly at NS&I following operational failures in the business.”
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