Greenknight thank you for agreeing with my point (perhaps I expressed it badly, but I understood it) - have a "Carrier Wednesday" (airfield with carrier deck) and other training periodically, you aren't embarked all the time. Somewhere earlier I specifically said that you can't just do it on an OCU and expect to pick it up 5 years later.
The problem that the UK will have is training on a proper carrier as I suspect our one and only will either be several thousand miles away or alongside - not sure how we can get around that other than throw in a nebulous "use allies". Or catntrap the second carrier!
These issues are of course service blind, the RN are no better able to overcome them than the RAF.
ps Bismark, I'm going for Rotary Observer.