A proper name for a holed stone is a Tolmen. Would be good to bring that into usage. There is a line of (I think) five of them somewhere in south Yorkshire and I suppose, seeing as there are several other Yorkshire sites in the film, that this stone is one of those. The name for the holed stones is something like Trainbridge - that's just a guess - or the Wheelwright stones. Archaeologists don't like holed stones, so they get scant attention, and this board follows that lead - and that's a shame. They're often dismissed as former gateposts, which they sometimes have been, though the dimensions of ancient ones will relate to units of the Megalithic Inch. In Bolton there are plenty of rectangular ones - which may say things about Boltonians old and new !