Largely glider / glider, I think, though I don't have the numbers.
On a 250km glider cross country flight last weekend, (Gransden, Chipping Camden, Hus Bos, Gransden) I saw probably 15-20 other gliders - several opposite direction within a few hundred metres. I think I only saw one or two GA powered aircraft.
Which raises the question, how much cross country flying in powered aircraft actually happens at the weekend? Where is everyone?
OK, I passed close to a couple of gliding sites on the way, but still!
Paul