Here's a site which should be of interest to British fans. This is a web cam positioned along the very busy West Coast Main Line in Euxton. Action is constant and features high speed Pendolinos and Voyagers of Virgin Trains, DMUs in local/regional service and plenty of freights, many of which are powered by EMD Class 66 locomotives. Overnight sleeper trains making their way to and from Scotland can be seen during the evening hours.
http://www.livestream.com/wcml_cam
Enjoy,
Bob