I heard an interview with the guy who's doing the revised edition. There is a bit of a hoo-ha because Wainwright stipulated that his books couldn't be changed for x number of years after his death, but the guy said he was a great fan of Wainwright but had the same problem, kept getting lost because most of Wainwright's paths don't exist anymore. Don't think he changed that much, just an up-to-date version I think. The purists don't like though.

I can't count the times I've been lost trying to find a path described in a guide, give me an OS any time!