I was doing one of my regular YouTube searches when I came across this great little video. Well I say little, its actually just over twenty minutes and is the window view of a Paddington to Plymouth train, for the whole journey - but speeded up 10 times. A fair bit of it is just a blur but there are some easily recognisable sections including the main stations along the route and of course the Sea Wall at Dawlish.
Video uploaded to YouTube by Paul Philpott.
Also you may want to check out another of his videos: a great high speed open top bus tour of Budapest