I have no idea what a Jacobite is but I now know what The Jacobite is. It is a steam train that travels up the west coast of Scotland on the West Highland line. Glasgow to Fort William in about five hours. Let the gif go through its paces to especially see what must be the most gorgeous viaduct in the world. I know little of Harry Potter, only having taken notice when the star was naked astride a horse, but there is some connection.
Later note, ok, the gif does not work, but the relevant photo is showing.