Worked in HK with a character with an unusual career path. Mustered out of RN as CPO in RNAS (nice touch at his farewell, wheeled in a Venom drop-tank with the anouncement "Bernard, in your time in the Navy you have consumed this much rum".) Enlisted in the army as a trainimg officer after his own retraining, finished up as a Captain.
Could he legitimately put (Captain RN, Retd.) or (Captain Retd. RN.) on his business cards?
Could be confusing.