For general information see Pendle 1 – GC56XPB
Carry on past the Trig Point on the paved path also passing what I’ve now renamed Pendle2A but surely you’ve got that? Eventually you reach the fence and gate. The cache is just to the right on this side. This path is on the map both as a Permissive Path and a path (undefined). To be honest I’ve no idea which of them you’re on – and the other doesn’t exist, so who cares?