Keith asked: Can you help me, I am trying to track down the inventor/maker of B&B Couplings.
I did a bit of digging and came up with: Sorry - I can't help with this. I thought ti might be Wizard Models (http://www.wizardmodels.co.uk/FrameSetShop.php?DM=wizabout) but they are DG & Spratt & Winkle only.
which wasn't much use. However a couple of days later, Keith answered his own question:
B&B Couplings in 2mm, 3mm and 4 mm versions as well as uncoupling magnets to suit, are available from
24 Layston Park
I post this in the hope it helps someone.