If you use last year's to plot a GPX trace you won't go wrong. NikW's version on Bikely looks correct. It's the routesheet I've had to tweak, not the route, though there is one point where users of GPX based on last year's route might save themselves about 100 meters!
Just got back from a week away, so should start sending out papers early next week. Will email wherever possible (in addition to the on-line entries, of course).
Phil.