 UWF1007 was reported to have later been fitted with a Cosworth FVA 1600 cc engine.Other racers were campaigned by John E. Miles (for Em Newman and Gordon Allen), Andrew Hedges, John Blanckley, Stanley Robinson, Roger Hurst, Tom Zettinger and Alberto Ruiz-Thiery who all raced cars on the continent at such venues as Mugello, the Nürburgring, Spa, Barcelona, Jyllandsring, Vila do Conde, Zolder, the Targa Florio and Jarama.Two Mk1 race cars were also shipped to the US, the first for Paul Richards to race in Group 6 events.