There will be an informal gathering in Richmond Park, a place Rowan loved, on Saturday afternoon. We'll meet at the Richmond Gate (map: http://www.pembroke-lodge.co.uk/i
There's supposed to be clear weather on Saturday, so the plan is to find a spot in the park, talk, perhaps play some music (a couple of us will be bringing stringed instruments; please feel free to bring whatever you feel is right for you). There isn't much of a specific plan, but we'll likely retire to one of the pubs near Richmond Park once it gets dark, so if you want to show up later then that's fine too; PM me for my mobile number if you don't have it, so that you can text me when you're close and I can tell you where we are.
Please spread the word, invite anybody you think might want to be there.