In hind sight I think because the lane became unpassable due to land slip they rerouted the bridal way across the adjacent field with the good will of the farmer.
However there is no vehicle right of way hence the downgrade ,
I know that a detirmined off roader will get through! but sombody got stuck in the lane in a unmodded disco a while back compleat with wife and kids
coming north /south from cardington to stretton ,and had to get towed out by said farmer,(it made the Shropshire star hot news).
this may have somthing to do with it.