You mean this one? -
http://www.classiclightweights.co.uk/bi ... li-rb.html
Owned by a friend of mine in the Bygone Bykes (Yorkshire) Club. I have another friend (also a BBC member) who has a couple more.
There's also this on Classic Rendezvous but it doesn't tell you much.
I must admit I'm quite surprised that there isn't more info available since they were quite popular in the 50's and 60's, featuring regularly in adverts in 'Sporting Cycist' magazine.
Today is the yesterday of tomorrow.