Long before there were Leavers or Remainers (#takemeback), there were northerners and southerners.
The only problem is that nobody can quite agree on where one starts and the other begins.
Pointless host Richard Osman decided to throw the question out to Twitter like a savage – and truly opened a can of worms.
Aside from the predictable bickering, people had some interesting opinions.
Which threw up some interesting nomenclature issues.
And political issues.
Some found the north-south division restricting.
And others decided culinary habits were a more reliable marker.
But it seems Twitter itself may have answered the thorny question when Watford Gap began to trend.
More: Six ways you can divide England, linguistically
More: This is officially where the North starts