Ah yes, the Cochrane Special, built by W.A. Cochrane of West Hampstead, London between 1933 and 1935.
Very little information is known about this three-wheeler except that it was constructed on a specially designed three-wheeler chassis, lightweight aluminium body and was designated chassis number one.
Mr. Cochrane then went on to build a four-wheeled sports car in 1954 - chassis number two - that I believe has been restored in the 1990s and was completed in 1998.