Based on the numbers signed up to the Meetup page for the Drowathon, myself and the team are currently thinking the following player combos. If you can suggest a better layout or know of missing people, please let us know.
Shanes’ Table: James, Sarah, Darron, Toby, Daniel Creed
Miks’ Table: Tilly, Daniel Page, Glenn, Colman, Matt + friend
Pedrs’ Table: Paul, Rich, Daisy, Chris, Adam
UK D&D Tweetup - Rise of the Underdark Blog 
Felix may be coming, and possibly two other new people, not sure, they were not around on Wednesday.