Private Air uses A319 and Boeing Bussiness Jets, with extra fuel tanks so
the Aircraft can fly Non-stop From Europe and the States.
Just read Evening Standard and it says the flight will take 9 hours via
Scotland or Ireland to refuel !! but saying that it could take you two hours during rush hour to get to LHR from the city and it will be 15 min Check-in, I think its going to be great.
Well done BA