Ok...I agree it was a tough one.
So here is the full answer so that we can keep things moving
http://en.wikipedia.org/wiki/Guyson_E12
1. Country of origin? –
“Britain”
2. What is the name of the car? -
“Guyson E12”
3. Who was the designer?
“William Towns”
4. Which car was used as the basis of the design?
“Jaguar E Type Mk.III”
Designed by William Towns for James (Jim) Thompson, the project began in 1972 when hill climb champion Thomson crashed his Jaguar E Type Mk.III. Thomson was also the director of an equipment manufacturer Guyson International.
Rather than having the E Type rebuilt to its original specification, Thomson commissioned former Aston Martin designer William Towns to come up with a completely new body.
Towns first removed the Jaguars damaged bonnet and the boot lid, he then covered the car with moulding clay, from which a set of moulds were created and produced a set of fibre glass panels. These panels were then attached to the E-Type’s bodywork by means of screws and resin, leaving the car’s basic superstructure (and most of its original panel work) entirely intact. If desired the owner could remove these panels and with superficial repairs and the replacement of the original bonnet and boot lid the car would be returned to its standard form.
The car then returned to Jaguar, where engine supremo Ron Beatty rebuilt the engine tuning it with the help of six 44mm Weber LDF carburettors to 345bhp. Unfortunately these carburettors stood proud of the hitherto flat bonnet so a hole was cut and the bonnet modified.
When Thompson finally took delivery of his new creation in 1974, he was suitably impressed. And he wasn't the only one: when he stopped at a motorway service station, he reportedly returned to his car to find a man from Jaguar "drooling over it", and bemoaning the fact that his own company produced nothing like it. Imagine his surprise when he learned that this was little more than a re-bodied E-type (although one can't help feeling that the distinctive E-Type windscreen should have been a dead give-away).
It has to be said that Towns himself was also much-enamoured of his latest design, for he wasted no time in applying the same conversion to his own E-Type, this time finishing it in blue; he decided to forego the engine upgrade, though, no doubt uneasy with the effect it would have on the sleek lines he had devised for the car. He also had it in mind to offer the conversion commercially for around £2,000 on top of the E-Type's £3,300 list price, but decided against this as the car was by this stage on the verge of being replaced by the XJS. Little could he have known back then that one day he would undertake a similar re-bodying exercise on the XJS itself...
William Towns was also responsible for the body design/styling of:
1964 Rover-BRM gas turbine car (with David Bache)
1967 Aston Martin DBS
1972 Jensen-Healey
1972 Minissima
1974 Aston Martin Lagonda
1976 Microdot
1976 Aston Martin Lagonda Series 2
1978 Hustler
1980 Aston Martin Bulldog
1985 TXC Tracer[3]
1988 Reliant SS2
1989 Railton F28 Fairmile and F29 Claremont
I have to say that the crashed E Type Jaguar probably looked better than this finished rebuild 
Each to their own!