Martin
I believe Woldrangers map is mostly correct but it is the old route, after Middletongue the route goes to Hells Gap SD 934 824 and then continues down the track(Gilbert Lane) to Cray checkpoint.
If you think it will be dark when you get here then recce this bit!!
They usually put a stile up for the day to cross the wall but last year it wasn't there. The route off Whernside wasn't flagged but LOTS of runners went wrong here last year so it may have been
Watch for the little kink in the wall 724 790 and cross there even if the stile hasn't appeared.
You do need to pass through a marked gate at 714 791
Hope this helps
Ian