If you ever wonder what its doing over in London, want to check the weather, do they really get snow? watch the double decker busses cross the bridge, tour boats on the Thames, maybe catch the bridge up? Or just to see the tide height against the bridge.
This is one of the better real time live cams:

http://www.ustream.tv/channel-popup/towerbridge

Enjoy, hey, maybe we could get Angharad and friends to walk across the bridge to the sidewalk on the other side of the road this side of the near tower, jump up and down and wave frantically at the camera at a preset time and date? :-)