The full title for the car, which has recently been advertised for sale, is Bentley sss-C2. It features a prototype 'display' chassis dating from 1965 which was acquired by Bentley Drivers Club racer Barry Eastick with the intention of turning it into a rather special racer. This he did with 6.5 litre dry sumped alloy V8 (supercharged for racing)and bodywork by Lyncar Engineering - a company which built its own Formula 1 car in the 1970s.
That's all I have, apart from the fact that it looks rather exciting.