The night before the conference, a social event will be held at the Brook Green Hotel. The following day all talks/receptions will be held at the Olympia Conference Center followed by another trip to the Brook Green Hotel that evening. Speakers for the day include Andrei Zmievski (Open Source Fellow at digg), Chris Shiflett (of OmniTI) and Hank Janssen (of Microsoft).
You can still register for the event at a cost of £120 covering the day of talks and a buffet lunch. Costs associated with the evening activities are not included.