Between 1975 and 1978 he mixed Formula One and Formula Two drives (including a spell in a private March for his own British Formula One Racing Team), never quite establishing himself in either category, but clinched the 1980 F2 championship for Toleman, who took him into F1 for 1981.
Entre 1975 e 1978 mesturou unidades de Fórmula Un e Fórmula 2 (incluído unha tempada nun March privado para o seu propio equipo o British Formula One Racing Team), nunca se asentou completamente en ningunha categoría, pero asegurouse o campionato F2 de 1980 para Toleman, quen o levou á F1 en 1981.