I was lucky enough to be involved in the feature for the magazine,
From Wasedale Head we took the Main Bridleway towards Styhead, but stayed on the lower path along the river, The magazine has showed the route wrongly using the Bridleway left of the beck/stream (middle one) but we actually took the one on the right of the beck.
The main reason for this is to avoid the loose, but more direct and very busy with walkers bridleway, its a slightly more interesting way up in that it zig zags as a climb, and in my opinion a nicer trail too, with some technical single track on the lower sections.
I would avoid this option in winter/wet conditions though, we had dry conditions on the day but there are some boggy bits on it.
I would recommend dual ply tyres too, the whole route stretches bike set up to the max, superb day out though you will enjoy it.