This car was described in an advert for it as an "Aerodynamic 500 cc competition car" with an all enveloping light alloy body on a light tubular frame. It had a rear-mounted vertical twin sports engine giving 120 bhp per ton. Apparently it was attractively finished in metallic blue with chrome embellishments.
It was being sold by Competition Cars Ltd of The Old Maltings, Nayland, Colchester for £600 - quite a lot of money in those days, which were probably the very early 1950s.
Since no name was mentioned I would have assumed it didn't have one, which would however have been strange..
Below is the picture I have (actually it was going to be one of my puzzles but you got there first!); Surely you can't read a name on the registration plate? Helluva computer you must have - or do you have another picture?!