Good luck Moxey, I'm saving that one for when I am a bit fitter. I am doing it with a couple of friends from work, and most of our cycling is limited to 12 mile commutes. we are setting off at 8 so if you pass somebody in a lime green BTwin top with a face to match say hi.
Madpensioner - there are three routes, 32km (flatish to Bonds Icecream shop at Elswick and Back, 70km which skirts the Bowland fells and 100km which goes over Waddington Fell and the Trough of Bowland. There are route maps for the two longer rides on the page linked in the OP, they are a bit of a faf as they open as a zip file with a .png image of the route in it.
HTH