Hi. 

Yes, the PROW is what I'd consider 'permanently blocked'. It was fenced and tied up by the property owner. (the PROW went down their driveway etc. etc.)

What I did in this case was walk back west about 40m and take the path running diagonally NE from Mevril Road (asphalt at the start). This then followed a well-established path across the field to a lane next to Cromford Mews. I've mapped this as a path. There were other paths across the field  too, which would benefit from a survey visit and mapping. 

The path next to the scout hut (south side) looked pretty overgrown from the Shallcross Incline side - I'd be less inclined :-) to map that as the primary route across the field.

I'd suggest the route I've mapped as the primary way across the field - as used by locals. 

I'd also be minded to tag it as the designated way - though prefer to leave that decision to local mappers.