In 1988, he won the Scottish Rally Championship, and came sixth in the 1990 RAC Rally, despite several accidents. The following year he turned professional and instantly tasted success, becoming British Rally Champion in 1991 and 1992 and making his debut in the British Touring Car Championship.
In 1995, Colin reached the top of his sport when he became the first Briton to win the World Rally Drivers title aged just 27. He played a crucial role in helping Subaru win the World Rally Championship Manufacturers title in 1995, 1996 and 1997, then moved to the Ford World Rally Sport team. Their four-year partnership yielded nine event wins.