This page deals with some of the designs which Frank Costin contributed to. Frank Costin was a car designer of unique talent , most of his designs were wonderfully unusally and always effective. He is known for the original gullwing Marcos perhaps best of all but I will start with one of his last designs, the TMC Costin which was produced in the mid-1980s in Ireland. The follwing scanned articles give you the background to the design and product.
Motorsport, August 1984
The Beaulieu Encyclopedia of the Automobile
A-Z of the Sportscar, 1945-1990