Thanks to Mick plus Griff's subsequent description, I managed to track down the patent for the Wedgelock axle - The product of one Boris Bezet, a former Polish National and later British Subject from Surrey. He originally applied for the British patent on 28 September 1955 (No.782,325) as shown on the following page ;
http://www.flying-scot.co.uk/
'Wedge-lock' appears a few times in the description given, and I guess it was his own name for the idea, subsequently adopted when it was sold however there's no indication of who actually produced them. It may well be of course he had them produced and sold under his own name...
Bezet had a few Patents, most notably another for a combined square taper and cotter combined fixing in 1950, plus a couple of other bicycle 'suspension' patents.
If anyone's got a photo of the axle or an original advert, I'd appreciate a copy to add to the info on the page.
Bob Reid
Stonehaven
Scotland