Details are coming in about a one-day Torchwood convention on Saturday April 26th in London. It will be called 'The Rift' and James Marsters will be among the featured guests. The venue is Porchester Hall in Bayswater. It will coincide with Marster's Waterfall Tour.
Sorry but that's about all we can tell you at the moment, in the notice there was no confirmation of any other guests. Tickets will go on sale at 9:00am UK time this Sunday the 10th on jamesmarsterslive.com. Perhaps they will put up more information on their site Saturday, because as of Friday night it provides few clues.
UPDATE: The Rift site has been updated. Joining Marsters will be convention favorite Gareth David-Lloyd, producer Richard Stokes and Alan Dale who will soon be appearing in series 2.