As far as I am aware, Armament Practice camps were regularly held at Akrotiri but mainly air to air gunnery with either towed targets or sometimes hawks used as enemy threats. Also we also had a gunnery range out in the North Sea for air to ground practice, I am guessing targets would be floated out to these danger areas around Cyprus to be shot up. I have read a few accounts in regards to these ranges in either Lightning Boys 1 or 2 as well as Phantom Boys.
In one incident a Lightning makes a dive attack on a target and after firing his guns finds out that the controls don't respond as advertised, He evertually makes it back to Gutersloh I think to reveal that the parachute cloth that was used to capture the shells hadn't been installed leaving them to ping about freely down the fuselage jamming the elevators!
Marc