Tim,
I've had this shot of Chivenor in my (small but perfectly formed) collection for a while. Judging by the kit on the ground (Hunter F.1s, Vampire FB.5s and T.11s) I guess it was taken around 1955?
It's not the best of scans I'm afraid - will see if I can do a better job of it now I've got a new, less grumpy, scanner.
My father's also got a few shots from his time with the other Hunter OCU (233 at Pembrey) in 1956-57 if they're of any interest to you?