"1975 saw NCK secure a remarkable fourth place overall in the Motoring News Rally Championship – a testament to Cyril's driving prowess and the incredible capabilities of NCK. The Mini faced formidable competition during that era, and Cyril's achievements were a testament to his skill and the exceptional machine he had created."
https://www.minisport.com/blog/rally-mi ... one-cyril/
"Cyril’s car is without doubt the ultimate road rally Mini development. Like Terry Kaby’s stage car the Mini Sport Mini seems to be the confounding all those who every now and again leap up to announce the Mini’s competition career is over. By careful planning and preparation Cyril Bolton has produced the car that could well bring road rallying honours back to British Leyland.’" June 1976, "Cars and Car Conversions"