Used to lane this area a lot until about 2 year ago (poss a little more) - there were some good tracks back then with some needing a bit of care.
A lot of it is SSSI
Most of the tracks have now been closed by the local auth.....you would have to check for any TROs on the BOATs....these were clearly signed with usage iirc at start/end.
Passable in standard disco1 - yes, very much so....
HTHs
Steve