I'd like to get to one of these, but London is a bit of a step for me from Norwich, so only weekends are practical, and preferably a Sunday. In other words, exactly the arrangements so far. I would have come last time, but on the day I was just too tired from earlier exertions.

I expect to be taking a holiday for part of August, but not actually going away anywhere, so I would be able to synchronise with the dates CannibalSmith offered.