These are the primary and most noticable differences:
The Airedale and cairngorm both have a full nylon lining with elasticated cuffs, the BCUK jacket doesn’t and uses military smock style single velcro tab cuffs, large enough to be rolled up beyond the elbows.
The hood design on the BCUK jacket is unique to the BCUK jacket and neither the Airedale or cairngorm have features such as the volume adjustment method or wired peak.
The chest pockets on the BCUK are much larger than those of both the Airedale and the cairngorm, reaching right around under each armpit.
The lower hand pockets on the BCUK jacket are micro fleece lined, a feature not present on either the Airedale or the cairngorm.
The shoulders of the BCUK jacket consist of two layers of ventile, where only one is present in both the cairngorm and the Airedale.
Thanks Stuart, I'd been looking for this information everywhere!
The adjustments to the Airedale (if they are as such?) make a lot of sense. The mesh lining is an aspect of some jackets I am keen to avoid. Is the microfleece the special Nikwax Analogy kind? I only ask since I would be interested if BCUK were to experiment with this combination as used by Snowsled. Specifically I am after a Ventile smock, is BCUK planning on developing one? Last question, does BCUK sell any modified versions of the jacket?