Probably also need to Add a p for premium econonmy
- Gradually being rolled out across qf 744 (9/30 done, although one is parked with a hole in its side)
- Will be present on qf 388 (ie the 380-800s)

Think JL has rolled out premium y on 773 and planning to continue to the 772s
773s are also fjy (so suggesting fjpy) (per seatguru)