1. The biggest J configuration with BA LHR JFK is 77J.
2. BA and VS operate from the artificicially and politically constrained LHR where demand on runway and more importantly terminal capacity makes a small all J aircraft unlikely for now.
3. PrivatAir will operate over 60 weekly Atlantic crossings for KL, LH, and LX this winter season with more apparently to follow.
4. Qatar have 100 seat A319LR in operation. There are no other scheduled commercial operators apart from PrivatAir.
5. This is a very specialist business, and B737 / A319 ETOPS operations don't fit nicely into mainline rosters or training.
6. This is a specialist business also due to the super high B737 A319 utilisations, up to 6,300 hours per annum , or almost twice the BA 747 average annual utilisation. Maintenance programmes have to be re-written and again this does not sit easily next to mainline B737 A319 maintenance programmes.
7. Finally the big crunch - try and finance commercially a B737 BBJ or an A319LR - both are hybrid aircraft with no logical homes after PTI, and therefore are a financial nightmare to lease.