[Mr.F]

Not well documented on the web, the car was a Claydon-Hamilton Super Sport Four (or SS4).
Tony Claydon and partner Hamilton have since parted company, but Tony continues to design - here is another example of his work on the Fiero based Finale (this one built by Candy Apple in the USA using a Claydon body design:



A brief note from a rare mention elsewhere on the web:

Claydon Hamilton Automotive Design, Maldon, Essex / C.H. Automotive, Bristol, Avon
The 1996 Supersport 4 was predominantly the work of Tony Claydon, an ex-racing driver and designer of the Tara 2 prototype that almost went into production as an Aston Martin. This was a four-seater coupe vaguely reminiscent of a Nissan 300ZX, using a steel chassis and glassfibre body, and sold mostly in kit form. The major components derived from the Ford Sierra (a 4x4 Cosworth option was even available) and Ford four-cylinder or various V8 engines could be installed. A split between the founders of the company led to a redesigned version called the SS4, later known as the Cerity R.

Numbers sold unknown - I've only ever seen the silver car originally pictured and used as the brochure model.