Bucklers!

[Oldfart]

Thanks for posting that Stu. That is a tilt front Mk1 shell (in my opinion) and certainly has the longer nose. That is the car now owned by Roger Munns number 90 in one of Ross' super photos from Chelsea and illustrates the nose very well in both photos. I think that it would pre-date 1958, but need to do a bit more checking to be sure of that.
Interesting to note that the photo Stu posted has the carbs RH side, perhaps those are the Elva head valve covers poking through the other bonnet cut.