I think there is a big sign over the M1 motorway, just to the south of Yorkshire, that officially warns you, you are crossing to 'The South'.

Mind you, if the scientists have got it right and the magnetic poles are due to flip over we could all be in big trouble.

I want to die peacefully in my sleep, just like grandpa. Not screaming and panicking like his passengers.
Don't drink and drive from The Lancre Tavern