This may be too simplistic but wasn't the Tony Davis/BMIBaby scenario all about getting the airports name changed to attract more foreign visitors to the East Midlands?
Many europeans didn't know the East Midlands, but they did know where Nottingham was
So the Airport authorities played ball, after all they didn't want to agitate a major player in the Loco revolution, but they did not mind upsetting the people of Derby and Leicester by changing the airports name to Nottingham.
Now a few years down the line...ermmmm, thanks for the loyalty BMIBaby, lets go back to Castledon, plenty of people know about the race track etc