If we are talking about other countries like Scotland, I bet this topic of North and South divides would be interesting on an Irish perspective, forgetting politics, would it align precisely with the current border I wonder.
Nothing will change my mind on the subject, history outweighs geography, accents, poverty, and tv stations, North = Northumbrians areas, Midlands = Mercian areas, West = Wessex areas, East = East Anglian areas, and the rest from Sussex to Essex is the South East. These rough areas are easy to define. An example is the United States, history dictates which states are in the South, not the clear cut longitude lines or the hard to map "redneck" accents. Another is South Australia, which is not even the second most southerly state there.
Anyone looking at a modern road map without further information would cut the line from The Wash to Shropshire, not a bad line if only one needs to be drawn... unless you live in the area it cuts through and know there is no such divide there in reality.
I used to live in Nottinghamshire and can't say I notice anything different from Mansfield to Bulwell to Arnold and Beeston, the towns are very similar, don't see this change others mention.