airball - Shoreham Airport's runway 21/03 is being re-designated 20/02. The information you read was probably being tongue-in-cheek. Heathrow's runways used to be 28L/10R and 28R/10L and changed sometime in the late 80s or early 90s. Farnborough's runway recently changed from 25/07 to 24/06 and there are many other examples.
