There is a RAF Air Trafficker who joined the RN as an observer. He passed Culdrose but then got chopped on his Lynx conversion. He went over to Pinger SK and got chopped there. Then he went RN ATC but didn't do well enough at it for the RN to be happy. The RAF took him so he transferred to a light blue hue. BUT he 'elected' to wear a RAF Navigator's brevet as he'd been awared hs RN 'moth'. He's never been RAF aircrew and never will. I wasn't happy when I saw it on his No 1s.