The rink has been set up in the former moat of the Tower, and uses real ice, unlike some of those other fake-ice rinks you can find. It isn't cheap, though, with a skating session setting you back between ten and twelve pounds. It is, however, a fantastic setting.
The rink is open 10am until 10pm, until 10th January 2011. For more information see http://www.toweroflondonicerink.com/