Correct me if I'm wrong, which I more than likely am, doesn't rule 5 purely state you must maintain "500ft separation between any man made object, person or vessel". Which to me says you can fly at 200ft AGL if you so wish, providing that you are 500ft away from any of the formentioned, so yes Spanner, hotcould may well have been lower than 500ft AGL, but he still may well be in accordance with rule 5...
If I am wrong - ignore my post completely and carry on I'm quite enjoying it
If I am right and there are people that want to say it isn't possible to fly below 500ft AGL and maintain a 500ft separation, please study Pythagoras' theorem.
PS. I am right