Ulster picture source

[stuartu]

Here is an un-cropped version, they are of Lawrence Clayton who was president of Brighton and Hove motor club and were discovered by Jim Wilkes in his Aunts loft, I will endeavour to see if Joss remembers which issue of the magazine these pages came from. I can also have a go at taking a better photo if Mike or anyone else  wants to have another try at photoshopping. 

Is that perhaps the self-same Ulster putting up an impressive smoke screen at lower right?

The car in Ian's picture has an air pump on the dash so may well be s/c but the car with the smokescreen looks as if it has a long scuttle and short bonnet to me.
Indeed, at a second glance it could be a Chummy - straight top to the body side. Maybe Jon E's elusive photo of Mr Flea?.
Regards,
Stuart