Today, a DFW-LHR flight was met by Royal Air Force Typhoon fighter jets and received permission for a priority approach at Heathrow. Was there some VIP aboard the flight? Nope. From the Telegraph:
The Typhoons, from RAF Coningsby in Lincolnshire, went to assist an American Airlines Boeing 767 heading for London from Dallas/Forth Worth in Texas following reports of a woman passenger trying to get on to the flight deck.
The Typhoons returned to base when it was realised ...