Are the body and lens cocked? If so, can you remove the lens?
As pof this evening, everything apart from the lens is free....I can crank the winder, roll the film on, remove and reinsert the dark slide, remove the film back. The curtains flip open and shut when the shutter is pressed. I just can't remove the lens. I have tried the screw turning trick to no avail, despite using the specialist Hasselblad screwdriver.

As I don't have another lens, not being able to remove the one that is on it (80mm Plannar CB) is not a major issue right now, but that's assuming it is actually working properly. It looks to me like it is but I am not a trained eye.