Sorry for high-jacking the thread, but non-Londoners (and Londoners in fact) might want to pay attention to this:
there is NO Northern Line this Saturday, due to the usual perfect timing by TFL in the choice of which lines to shut down.
As a result, to get to the Forum you need to take a train to Kentish Town rail station (next to the tube station, so by far the nearest to the venue) from St. Pancras International (there should be plenty but check times) or the Overground line (orange on the maps) to Kentish Town West (slightly further away); you can get this from Highbury & Islington, on the Victoria (light blue) line.
Those of you who were thinking of going to Camden first can do so by getting off at Camden Road, one stop before Kentish Town West on the Overground Line. Those (most likely including me) who want to start in the Bree Louise may also want to bear this in mind, cos it won't be possible to take the tube up so it might be necessary to leave the pub in good time to walk/bus it up to Kentish Town.