Not sure this is the best argument for BAA/Heathrow to engage public opinion...
"Failure to keep a major hub airport could cost the UK up to one million front-of-the-aircraft passengers a year, Heathrow bosses are expected to say tomorrow... The possible one million lost passengers are those that fly in the first-class and business-class seats on flights through Heathrow."
Heathrow chiefs to make the case for keeping major UK airport hub - Home News - UK - The Independent