Following his Formula Atlantic success, Nicholson commissioned Martin Slater of Lyncar to build him a Formula One car, despite, by this time, having established his own engine building business, which meant he was unable to commit to a full grand prix season. His race entries, therefore, were mainly in non-championship races. He entered the British Grand Prix in 1974 and 1975 and qualified for the latter race. He was classified 17th, five laps behind, despite crashing in the heavy storm towards the end of the race. Nicholson subsequently planned a further and stronger attempt at Formula One with a privateer McLaren M23 but the purchase of the chassis fell through. He did continue in both Formula Two and Formula 5000 in 1976 before racing in his native New Zealand in January 1977.