It seems our Ordnance Survey map-reading skills are fairly dismal

“Over a third of motorists struggled to read a four-figure grid reference and a staggering 83 per cent failed to identify the “motorway” map symbol. … When tested on their map reading skills, only 1 per cent would pass the Cub Scout Map Reader badge…”

Which is not such a shock, I suppose, when you remember our appallingly high levels of functional illiteracy.