I have just found a mentioning of seemingly the same car - 1957 SCCA race at Cumberland, driven by John Norwood in FMod class. Seems the car has been imported to the USA and then brought back to UK, as the photo is from a British hillclimb, as you have said. Or, maybe, there was another one?
Probably, though, it is a typo, as the next race he drove a Lister-Bristol...