Allan, I'm awarding the point to you as you obviously guessed the car correctly.
As far as I can tell it was built in Hadley Wood, Herts. in 1956.
It was completed to a high standard with a new 1100cc Climax engine, TC gearbox, Lister front and Lotus De Dion rear with Alfin brakes. Chassis was light tubular and the body was glass fibre painted BRG.
It was also equipped with an Austin-Healey screen and hood for touring. (see photo below)
"Marriage forces immediate sale" was the reason given for selling the car just after it had been finished.