While digging deeper on that Bored Teenagers Dead Airmen Vox Phantoms business, I'd long had saved the image on the BT website with Dead Airmen associated with "4D Rhythms" (see www.boredteenagers.co.uk/dead_airmen.htm).
Well here we are from Zigzag magazine 103 the small labels catalogue insert, an advert that can only be described in retrospect as "optimistic":
The 4D Rhythms label entry on discogs (which I will work on) has a note "info from Zigzag 103. Fore runner to On-U-Sound?", and I guess that's true.
Bob Harding from Mothmen also says in the interview on the prs site: "This was prior to the founding of On-U Sound and Adrian had a label called 4D Rhythms at the time. The plan was to release the Suns Of Arqa album on 4D but Adrian decided he'd rather put out an album by a band who played live as well, Suns Of Arqa being a strictly studio-based project at that point."
Wasn't 4D Rhythms also a kind of management/booking agency-type deal? Hence the list of bands/artists being those they 'looked after', rather than those that they were actually going to release records by
Somewhere rattling around my brain is a Dexys Midnight Runners connection too