Overflying airfields
What is the normal actions to take if, for example, your route overfly's an airfield? Fly around the airfield? Fly over at significatly higher than the circuit? Also, what about radio calls. For example, if you are on thames radar, and you are overflying an airfield, do you contact the airfield and say something like : 'G-XXXX Requesting permission to overfly the field at 3000ft' or just stay on thames radar?
Cheers,
Louis Coke