Thanks for the heads up on this. Ian In London is a favourite of mine, I enjoy his vids but enjoy his dog moreHere is an article that appeared on this forum some time ago might find it is relevent to your problem
CAA confirmation that land owners cannot prevent you flying over their land

It seems from your response that I might have unintentionally broken the rules by flying at around 50m or lower. I was more concerned about the nearby military base. No people around when I did it and didn't fly over the stones.
Thanks again
NG