Complex sentence: His most notable success to date was becoming 2009 British Touring Car Champion driving for Team RAC and 2014 British Touring Car Champion driving for Ebay Motors He has also competed in the World Touring Car Championship driving a BMW 320si for West Surrey Racing (WSR).
Split into simpler sentences: His most notable success to date was becoming 2009 and 2014 British Touring Car Champion driving for Team RAC. Since then he has competed in the World Touring Car Championship driving a BMW 320si for West Surrey Racing (WSR).