I Would hate to say it but i think baby are on the way out.
The EDI Flight on the 27/11 is 42 Seats full
Please, How do you know this? Hopefully you are not working this out from the online seat map for the flight, as at this time before the flight it gives very little indication of how many people will actually be flying the route...
Most people check-in online around 48hours before and so more seats will be allocated. Not only this but alot of babys domestic customers do book last minute, so this also helps load factor and obviously the higher fares closer to departure help on bringing the yield closer together.
If this is what you are going by then you could easily say the same about flybe. Just 17 seats pre-booked so far and online check-in doesn't open till 36 hours before departure i dont think...