[2] She won the Ladies' British Open Amateur Stroke Play Championship in 1999 and 2002,[3] a year she also won the European Ladies Amateur Championship[4] Brewerton represented Great Britain and Ireland in the Curtis Cup in 2000,[5] and the Vagliano Trophy in 2001[6] and 2003.

She played in the 2002 Espirito Santo Trophy World Amateur Golf Team Championships[9][10] and was named as the Daily Telegraph Golfer of the year.

[1] In 2005, together with Becky Morgan,[17] Brewerton finished sixth in the Women's World Cup of Golf in South Africa.

[18][19] Brewerton's maiden professional victory was a three stroke win at the 2007 Ladies English Open.

These performances led to her selection as a captain's pick for the 2009 European Solheim Cup team and to the BBC Wales Sports Personality of the Year Award shortlist.