I called United and was told I needed to go to Heathrow to get my ticket re-issued. So, after a few phone calls back home and a satisfying lunch of fish and chips, I took the long Tube ride out there. When I got there, the ticket line was suprisingly short. After the 6 individuals in front of me were helped, I stepped up and was told that my flight was, in fact, going to take off. Did I still want to be on it? Well, yes, except for the fact that all of my luggage was back at the hotel. The guy apologized, and said that he'd put me on a flight tomorrow. That was pretty cool, especially since I thought they were booked up until next Thursday. "Aisle or window?" he then asked me. Wow, guess they have more seats than I thought. So I got my window seat, and will be attempting to leave again tomorrow. This time I'm not calling first. Look here if you want to see the flight status.
On the way back to the Underground, I walked a few feet away from security forces carrying rifles. That was fairly jolting.
So now I have to buy a clean shirt for tomorrow. (I have clean everything else for one day.) I think I can handle that.