done the tissington and high peak trails with the tunnel - is that the one to ashbourne - not sure last time I did it I went off at Thorpe, but can remember a long tunnel from the time before. Also did a bit of the
rutland water loop though as I'd cycled there from Leicester (on a hybrid) and was nowhere near as used to cycling as I am now I didn't go all the way round.
Looks like a good book, some nice ideas...