The frame was the widened chassis of the Halford-Cross Rotary Special racing car which was such a failure it was broken up by the Works, it was painted green and re-numbered as Chassis WT-68. The rear section of the car was a second series of the distinctive MG Airline coupe with a sliding sunroof and an enclosed rear spare manufactured by Carbodies, later known as London Taxis International, a company owned by Manganese Bronze Holdings ( Now owned by Geely and trading as the London Electric Vehicle Company).
