You have almost fooled me. Because you have reduced the color picture to a b&w, I first thought this is an archive shot.
Anyhow, to get down to business, this is a car by Martin Plastics, body number 4. Name is Martin Sports Ford Special. The Martin has a Ford 8hp sidevalve engine.
Only five are still known to exist: one is in Germany undergoing a long restoration.
Frederick E. Martin started out as a panel beater, and established Martin Plastics in 1953. The prototype was produced in the same year (TKK 86), and exhibited on the Bakelite Stand at the British Plastics Exhibition. It received an award for good design.