bmi always trim back services at Xmas / New Year. Nothing startling there, we like the chance to go on stby for a couple of weeks and have a breather. Same for many other airlines.
The routes to Scotland, especially those from bases other than LHR, are generally pitched at business passengers, albeit without business service in many cases. The fares reflect this. I do not think the airline would attract many New Years revellers at the fares charged. No sleep lost.
The Luton pipe-dream has been canned as the aircraft is required elsewhere. It was never going to happen...
Back to my beer and mince pies.