As well as constructing their own sports racers, JBW also prepared and entered Cooper single-seater racing cars for Naylor to drive in Formula Two and occasional Formula One events.
Serta membangun pembalap olah raga mereka sendiri, JBW juga mempersiapkan dan memasuki mobil balap single-seater Cooper untuk Naylor mengendarai Formula Dua dan acara Formula Satu sesekali.