At Oulton Park in October 1960 Hart had a bad crash with the car, which led to Terry designing the Mk4 series 2, which Hart drove in 1961.
No circuíto de Oulton Park, en outubro de 1960, Hart tivo un accidente co coche, o que levou a Terry a deseñar a serie Mk4 2, que Hart pilotou en 1961.