(at around 43 mins) When they are along the embankment in the stream, you can see in the top left side of the screen, a pair of woman's hands with red nail polish holding a black box with 3 white vertical stripes. See more
You know, Thames, this is the perfect place for revenge.
Other than a 12th Century torture chamber with iron maidens and a few racks, it runs a close second. But you know, I wouldn't put it past you to call Torture Chambers-R-Us and ask for an immediate installation.