He participated in two Formula One Grands Prix in 1982 with the backmarker Theodore team, failing to qualify for another three.

He failed to finish in either of the Grands Prix he started and scored no Formula One championship points.

At that time, he also tested a McLaren MP4/1 Formula One car in October 1982 against Marlboro-backed Spirit Racing's European F2 drivers like Stefan Johansson and Thierry Boutsen.

He is also a driver coach for Indy Lights team Brian Stewart Racing.

He co-authored a book with Mark Hughes which was released in the UK on 8 August 2008, titled Crashed and Byrned: The Greatest Racing Driver You Never Saw.