Next stop food and a bit of shopping, then the Hilton where I shall check in with friends etc. and probably stay the rest of the afternoon/evening. Tomorrow the actual con.
* Unfortunately this turned out to be untrue, I misread the rules; The Freedom Pass covers buses, underground, trams and trains in the Transport for London area, buses only elsewhere. But I realised this early on and paid for all day tickets, including the first day, so I don't feel too bad about being a bit naughty on the first trip. Ended up costing me about £24 over the whole con, which is still a hell of a lot cheaper per day than staying at the main hotel.