I imagine an intercontinental no-frills airline.
Only one type of aircraft, 330-300 or 340-600.
Based in London it would connect it to New York, Los Angeles, San Francisco, Atlanta, Chicago, Miami, Seattle, Toronto, Rio de Janeiro, Buenos Aires, Hong Kong, Singapore, Tokyi, Seul, Bombay, Sydney, Melbourne.
Bookings only on the Net, point to point connections, low level airports (STN would be the main hub) where possible, no PTVs, no food, no entertainment. All tourist class.
I'd fly that Airline!!!!!!