Physio Ian,
Myself and a few others will be going up to do a few reccies before the race next year. I too had come from the road and ran it for the first time last year off the back of 2 qualifying races. These were both AM races and I also did a couple of reccies of the course. I struggled like mad on race day and wished I had done some AL races, which I think will better prepare anyone for this race. I have done quite a few long, hard races on the road and found this to be the hardest thing i've ever done. As someone described before, the climb up Whernside was horrendous and I too got terrible cramp.
If you fancy a good AL to prepare you for this race and more importantly get you a qualifying race, do the Peris Horseshoe next Saturday in Llanberis.