Complex sentence: The design was largely the work of Peter Wilks and "Spen" King who, like Wilks, was a nephew of brothers Spencer and Maurice Wilks who ran the Rover car company and was later famous for his involvement in many Rover and Leyland Group designs.
Split into simpler sentences: The design was largely the work of Peter Wilks and "Spen" King who, like Wilks, was a nephew of brothers Spencer and Maurice Wilks who ran Rover. Spencer King was later famous for his involvement in many Rover and Leyland Group designs.