"Pete has discovered an overlooked monument in a very well known landscape, which just goes to show how many there might be in less known landscapes, such as the heather uplands, which have effectively been closed for a couple of centuries, by the game shooters!"

Well exactly. If he HAS done so it has huge implications not just for the fact of discovering it but for what MUST be out there to be found in less well-examined places - which is everywhere!