Just to close off Chug’s query. They are Trade Group (TG) 19 amongst the Ground Trades and they are entitled “TG19 Air & Ground Stewards”. The deal is that after joining they will all do an OCU and complete at least 1x flying tour, then they may well be employed on Mobile Catering Support Units (MCSUs) or work in the Messes or in other Catering roles. So the Cabin Crew role is very much one of many roles within their TG that they will be employed in during their career. When employed as Cabin Crew they do get access to enhanced medical screening, avmed trg, flying kit and also appear in the auth sheets as part of the Crew of the aircraft (only used on Voyager and BAe 146). So they are treated as part of the crew for passenger carrying roles on the aircraft - the terminology of Aircrew in the RAF is nuanced slightly in that only Officer Aircrew and Non-Commissioned Aircrew (NCA) of the Flying Branch are
de facto Aircrew within the RAF. Which is why the term ‘Airborne Specialist’ has been chosen and probably should apply to them too (in my opinion). It also important to note that NCA are
not a TG like the Other Rank Trades. They are a unique cadre in themselves and there legacy in regulations and KRs/QRs goes back to 1939 and the ill-fated 1947 Aircrew Scheme (of which only Master Aircrew rank badges survive!). They have unique terms of service and pay structures too.
You might like this little video on Cabin Crew conducting their role - they seem justifiably proud of it too.