Originally Posted by Pax Vobiscum
On the other hand, BA are buying 1000-off ...
A bit more than that, even! On the assumption that the 744s are evenly divided between 38J and 70J, that's an average of 54J per aircraft.
So:-
744: 57 x 54 seats = 3078
777: 43 x 48 seats = 2064
That's not allowing for the 767s that have or are having longhaul J put in.