Gentlemen, ladies and members of the Royal Navy - thank you for your kind words of advice, support and encouragement, exactly what I expected from the keen readers of pprune. I had heard that the 'light bulb' was what you would be entitled to wear without doing pre para, but having seen many many people wearing para wings on their blues who clearly have never in a million years done pre para, I naively thought that was a myth.
I now stand corrected but will probably do the trg anyway - you never know when it might come in handy.........
