BAML from what I remember was not a particularly reliable bird and had to be used as HH's own 206's were actively engaged elsewhere. BAML/BAZN were also used on other projects.
The ship Marc Wolfe flew through the building was an Air Hanson ship but cannot remember the reggie. I think some pipework was put on the front of the ship for the scooping up of the wheelchair scene too.
BBCA & BBUY popped up later in my life with Aeromega BBCA as itself and BBUY as HRAY (Then HMPH)
At one stage we had HUMT, HMPH & HMPT all belonging to Mightycraft (Humphrey Walters).
HMPT was a wreck when we bought it (D-HARO Rotorflug) and we took a bunch of components from Martin Pipe's old aircraft and built HMPT on the D-Reg and then exported it to the UK while in the hangar at Stapleford.
I love the 206 and still enjoy seeing/hearing them in the skies over Essex.