Although the UK does not have Thanksgiving, weirdly it does have Black Friday. You took the wrong part of American customs, guys.
Rumblings Underground: Staying out near the end of the Piccadilly line becomes exciting when a broken signal causes a blockage just out from where it starts crossing other lines. Stumbling out onto the street in some unknown suburb called South Ealing, blessings fall in the form of a bus whose destination sign reads Ealing Broadway. A lightbulb goes on when I remember that's the name of the station at the end of the Central line. However, chaos re-emerges in town. The District line is half-closed, and the Circle line is entirely closed, facts only revealed in the form of inaudible station announcements, and more slowly in the form of trains that don't arrive.
Thing I brought with me that I turned out not to need: a voltage converter. Turns out the chargers I use for my tablets are 240-friendly. Could have used a second plug adapter, though. As for my electric toothbrush, first off it holds a charge for well over a week, which I hadn't expected; and second, there's a 115-volt outlet in the bathroom of at least two of the hotels I've stayed in, and it takes the American plugs, too. It's labeled "shaver only," but I won't tell if you won't.
Thing I didn't bring enough of but should have: the unfoldable gauze dressing I use on my skin condition, which every pharmacy chain in the US carries in various quantity boxes, is completely unknown in the UK. I have to make do with tiny little pads, which I rip off from the bandages they're mounted on and apply in large numbers. (It goes under my compression socks, which is why I don't need anything else to hold it in place.)