Thanks for all that! I'm pleased about the Blue1/SAS flights as I really like flying the 717.
As for the "Airbee", I think this was simply a bug in the codes in the booking site I was using. The LH website does show these as BmI Regional. I had heard of the original Airbee going out of business an I'd kind of assumed LH was somehow ressurecting them as a regional arm. So, I'm assuming those flight can also be booked directly through Bmi? That would make it a codeshare rather than wetlease.
Looking forward to flying the Helvetic F100 again too. A bit of a blast from the past when boarding, but you quickly realise that 1980 style searing was so much more comfortable than the current Swiss or Lufthansa offering which are about 4mm thick, too short in the base and feel like they have no padding at all - after an hour or so anyway.