Not quite as marked as America, but there's a friendly rivalry for sure.
We mostly just take the mickey out of each other by way of stereotypes! I've mostly felt rather exluded from those arguments as I come from the south west of england which has stereotypes all of its own (we are simple country folk down there
but now I live in London I qualify as a proper soft southerner!
The stereotypes run something like this:
North: coal mining, whippets, pigeon fancying, flat caps, ale, up for a fight.
South: money-obsessed, rude, pretentious, inability to hold one's drink.
Anyone care to add to my horrible list?!
There are also positive aspects to both stereotypes as well I hasten to add! Northerners are famous for being very friendly for example.
PS. This is all meant in good humour so please don't anyone get offended! Feel free to mock me for being a tractor-driving-yokel