AA Trafficwatch: Real-time online traffic information service from the AA. Check your route for problems before you set off.
Getmethere.co.uk:: Advanced telematics program from Toyota. You can scroll around a map of GB or go straight to highlighted problem areas to view in real-time.
RAC Traffic Info: Online traffic information service. Select the area that you want to view the traffic info for and then click go.
TrafficMap: Real-time traffic information provided by the highways agency. User uk map, drop down and scrolling alerts to investigate.
Vauxhall TrafficNet: Very cool online traffic info page that shows visually where the problems and snarl-ups are. Needs shockwave plug in for your browser.