Thanks guys, am aware of the SBDU group...my interest and knowledge was originally limited to the fact that I ordered an SBDU frame in 1985 from GO'D at Ilkeston (rather from a Raleigh dealer).
Living in Surrey at this time meant I had many many framebuilders to choose from, but having been a follower of the TdF as a schoolboy it was the SBDU palmares that swung it.
BITD (mid 1980s) not many cyclists were aware of the SBDU, so it was exclusive too. Mine is built in 531Pro, which GO'D advised as my build at the time was more track/rugby player (I did play rugby). It turns out mine was one of the last made in that tubeset (GO'D told me this when I collected the frameset).
However, in recent times I have published a couple of pieces on the SBDU.
We've gone way off topic, this is a sale thread, so my apologies to the seller, but it just goes to show how much interest there is in the SBDU.
Roadking.