So far my favourite moment was swimming in a pond. I've been meaning to give outdoor swimming a go for a while now, but never quite got round to it, so you can imagine my excitement when I had an invitation to visit a "ladies pond".
The Hampstead Heath Ladies' Pond (also called the Kenwood Ladies' Pond) is a beautiful stretch of water surrounded by trees and small grassy areas for sitting and reading/chatting/sunbathing. It is "manned" by lifeguards and is generally idyllic. Swimming is one of my favourite activities, and swimming with a couple of friends and some Canada geese was pretty much perfect.
It's not the sort of place to take photos, so this is the only one I have:
I hope you can imagine how glorious it was!