are greatly exaggerated
Of course, we all know that National Express is/was part owned by the Cosmen Brothers (approx 18%) and they are Spanish. As are the owners of the Airport but, equally of course, there is no connection.
... via a "timetables" for Luton Airport; but if you ask for route 757...
But, somewhat more mysteriously, Arriva's former partner, Easybus, started its own service from Baker Street to the Airport from May 1st.
So is the National Express deal exclusive? Or not?
Cramped minibus from Baker Street
High end luxury from Victoria Coach Station
Arriva Green Line
Possibly slightly less luxury from Buckingham Palace Road ...
... with an extra change in the Carparkz car parks.