An elderly couple's road trip around south east England *(Note for those unfamiliar with the British road network: 'A' roads are main, or arterial, roads and they are all identified by 'A' and a number.)* An elderly man is driving his wife on a road trip around the south east of England. Shortly after getting on to the A2, a police car signals them to pull over, and the old man obliges. The police officer walks up to the driver's side and the old man winds down the window. The policeman asks him…