@objectivetruth When I got married and changed my name my mum sent me my premium bonds to change the details. This was pre internet.
At the beginning of the year I decided to buy some more and linked it with my old bonds. I’d moved several times in the intervening years and any wins would have been missed.
Turns out they weren’t my bonds, we have no idea where mine went, but my mum’s, from 1957. And in all that time, they have won nothing.