The quote you found is correct - it is a 1985 Birchfield Sports from C.V. Shapecraft, Northampton, UK
A completed car cost 12,000 pounds sterling a staggering amount for the day.
It was also offered as a kit.
The Birchfield was based on a spaceframe chassis and used Jaguar XJ6 mechanicals.
Although it was inspired by the Jaguar SS it wasn't a replica.
Quality was extremely high with its handcrafted aluminium body and chromed brass radiator.
It was withdrawn from sale in 1987 as being too uneconomic to produce.
I should let you in on a small secret - I forgot to erase the builder's name on the wall behind the car!
Well done - another point for you.