Managed to carefully jack up the side on the bank just enough to get the track back on. Jacked up the front so we could just get a thick plank, (No comments thank you) under the front of the other track as a ramp and drove it out with the aid of a Fordson Dexta.
He said I could drive it, but between a cup of coffee on his veranda, chatting and admiring the view, I forgot.