Complex sentence: He represented Great Britain in 2002 against New Zealand (3 matches), in 2003 against Australia (2 matches, plus 1 as sub), and in the 2005 Tri Nations against Australia and New Zealand (2 matches).
Split into simpler sentences: He represented Great Britain in 2002 against New Zealand (3 matches), in 2003 against Australia (2 matches, plus 1 as sub). He played in the 2005 Tri Nations against Australia and New Zealand (2 matches).