Gus Kuhn had a Norton racing team in the 1970s. Post-1976 they sold BMWs...I wen there into the 1980s to buy 'Gold-Top' gloves . It looks as if they traded until the late 1980s.
Ah, thank you Henk, you have all the answers, and the photos! Looking at the brickwork on the wall to the right of your pic I think the Forum photo may have been taken round there.
I notice the fuel bowl is not the standard 1B but the extended arm 1E that does not have the horizontal fuel elbow below the float chamber. Not very common although listed for 1940-5 same as the 276C/1B carburetter.
I note in the first photo registration FFD 353 - my two SWD Big 4s are FFD821 and FFD 993 both having been sold I believe by Copes in 1946.
The second photo - now that is a gem of a Norton - possibly a 1947 machine as it seems to have the post war gearbox and the pushrod tubes are inclined as opposed to parallel but no doubt others will confirm or otherwise. I also note the front brake plate is on the opposite side to the WD Norton 16Hs and Big 4s.
'HGU' is a 1946 London series. The machine looks to be a Model 18 to trials specification...The forerunner to the 500T but heavy and not particularly agile.
It looks as if the photos were made as publicity for the stand manufacturer. There is a difference between lifting a bicycle into a stand and a heavy motorcycle though...Getting it out again would be interesting too, especially with a kerb behind. I'd like to see a film of people trying to use it !
I like the Enfield, pre-War s/v with pressed steel girders. Possibly an S or SF (Deluxe 250) from 38-39? It looks like it has a Dunlop rubber saddle as well. Great picture!
REgards, Mark