<"We have an problem with our No4 engine. Our engineers have suggested that it may cure itself if we shut it down and restart it. Where would be the best place to do that?"
Ground Controller (quick as a flash - and with feeling!:
GATWICK>
AAhh.. Nice to know the spirit of comradeship still exists between Heathrow and Gatwick! Tee Hee!! (Old hands might understand - Sorry Tom and the boys!)