South of the River or North of the M25 or indeed to the Grim Mid West.
Places devoutly to be avoided.
Nothing of any interest happens south of the river Thames or north of London's orbital motorway the M25.
One of the Chaps pays extra when flying across the United States to avoid crossing the Mid West and running the risk of a forced landing followed by being buggered by an itinerant one-eyed buck toothed redneck who'd then marry the Chap to his father and brother simultaneously even though the aforementioned is already married to them. Or something.