Mid Wales in the early 80's was the place to be for low flying aircraft. Hawks, Hunters, Harriers , the odd Tornado, A10 Warthogs and even Hercs hugging the terrain.
I have to say though that the most impressive flying I saw was when I was out for a run one day. In the valley I heard the noise of a low flying F-111. It was so low, it was practically level with me ( some 100 yards to my left) as I ran along the road. It then pitched rapidly up ( and my heart was in my mouth) to avoid a tree! ( no bulls++t). It then dropped backed down and continued on its merry way west...happy days!