Once a Wheeler
…always a wheeler
Possible of course, but unlikely enough to arouse serious suspicions. Have a good root around to see if you may have a few thousand forgotten premium bonds somewhere. So long as you have your Bond Holder's number, the easiest way to do that is to set up an online account — maybe an unexpected hoard of bonds will suddenly appear. You can then cash them in and close the account if you want to. I think there is also a lost bond service but the online account is likely to be quickest.