I think the point is being missed!
The reason why I'm asking is, that I planned to go "Valley Flying" in South Wales in a Civilian aircraft, and was planning on staying between 500-1000", so just above the RAF boys talking in "jive" as you put it. Luckily I am fully conversant in jive!!
The mark one eyeball is always handy in the lookout department (but never good enough), but being forewarned is forearmed. The UHF Frequency is used as a listening watch, but not as a chat frequency.
P.S. The info on the LFS from the RAF site is good, I'll be programming my flight around the free days and the Wx!