Complex sentence: He competed for England in the men's 20km walk at the 2006 Commonwealth Games, at a number of World Cup events for Great Britain and has a twin brother named Dominic who is also a racewalker.
Split into simpler sentences: He competed for England in the men's 20 km walk at the 2006 Commonwealth Games and at a number of World Cup events for Great Britain. He has a twin brother named Dominic who is also a racewalker.