It does tell that the route is intended to be a wheelchair friendly way, because that is what the that new construction is. I think the 1:25k OS map might show a fence line at that point, the landowner may not need it any longer so has not maintained it or renewed it to the gate, but the authority with the duty of care to provide access through the virtual reality of the fence line is required to act to the guide lines.
After 3 years on a LAF some of the speak may have rubbed off