Who really cares what CAS wears! and as for people who wear chip hats and black leather flying jackets! don't get me started.
Why would anyone want to purchase a chip hat to wear when the RAF provides you with a perfectly good free beret.
Also I believe that the current rules for theatre mean that you don't have to completely sanitise before you go flying, name badges , sqn crests, brevets etc are all considered fine, the thinking behind this is that the type of people on the ground who may capture you post crash aren't interested in what your job is or what you might know about the aircraft or it's systems, they will just be extactic to have captured any coalition member to parade and use in the propaganda war.