My initial thinking was that the article is just crying out to have some of its sections refactored into a route section and that there s probably good sourcing for the route a prose description thereof and probably other things as well in the books cited Unfortunately I have no access to the books By the way You ve demonstrated once again that other people s access to sources is superior to mine I have no access to The Guardian newspaper in the 1970s My educated guess is that if you pull up the books by Sellers or by the Kelsalls you ll find all of the distances and intersections ready made