Complex sentence: Former members of the club include the British racing driver and two-time Formula One World Champion Graham Hill, who used the colours of the club as his helmet design (as did his son, Damon, also Formula One World Champion).
Split into simpler sentences: Former members of the club include the British racing driver and two-time Formula One World Champion Graham Hill. He used the colours of the club as his motor racing helmet design (as did his son, Damon, also Formula One World Champion).