There's a mystery behind this car, if anyone can add more information.
It is an Iota, apparently, although if that's a JAP in the back, it's no JAP i've seen. But closer inspection suggests it isn't a Norton either (the rocker covers are too small). What I do know is that this car was built up by Don Parker - more commonly associated with Kiefts and (by this stage) Coopers. It could well be outside his Clapham workshop, although cobbled streets and stable doors were much more common back then. I believe it was a road car rather than a racer (note the kick start under the engine cover, but where are all the lights?), but have nothing else. The car is clearly some way from completion, but I have nothing on file to indicate how it finished. In fact, the one person who really should know about this car got really interested when I contacted him - he has almost nothing on the car either, and it disappeared without a trace.
If anyone knows any more about this car or has more images, I'd be grateful if you would post it here, or more discreetly perhaps drop me a PM