In my later, post RAF life, I was required to do some work at a certain government establishment in Cheltenham.
To gain access, I was to PV'd, but because I had moved house so often I couldn't comply with the requirements of supplying referee's that were not work or family related, that had known me continuously for X years.
I suggested that they might like to liaise with RAF Insworth where it was on record that I had been trusted to work on nuclear armed a/c only a few years previously.
I don't know if the powers that be, ever did this, but not only was I allowed, under constant escort, into the 'Cabbage Patch', but sometime later when I had been promoted out of that job and out of the area. This same customer needed some more work done and insisted to the company that I was the person to do it!