Hello, just joined. Just thought I would throw in a fact.
When I was a teenager, I saw this car (in White) being driven by Keith Schellenberg at the opening day of Bruce Ropners
local racing circuit of Croft in North Yorkshire in the mid sixties - and it was running the local Darlington 'HN' registration plate.
To add to this, I currently own a 1962 vehicle that carries an 'HN' registration, unfortunately, it isn't a Cobra, or an AC !