In my time in the RAF I met loads of ex Army/Navy who had crossed over to light blue but never knew anybody who went the other way
We had two crustaceans that saw the light and were deemed good enough to wear dark blue. There was also another who tried but wasn't allowed. He was a top bloke but, in the opinion of their Lordships, his time left in service was not enough to justify the transfer.
This was on the SHAR, so, two out of a total of 15 (or whatever it was
) and that included the ship's cat, is quite a high percentage. Luckily they sent the good guys to the Sea Jet (apart from you Spon. I know you read this drivel sometimes
).