My main aim today was to pick up Earth Caches. However I'd been speaking to a lady at Lockeridge Dene. She'd mentioned Avebury was nearby so I decided to drop in as I was passing.
I've been to Avebury on a number of occasions, but never as a cacher. I went off to the information boards and admired the hill. The recent rain seems to have made a little lake in front of it, and that in turn has led to a plague of little flies.
I took a few photos and found the answer to the question. Email sent as required.