Newton was born at Crewe, Cheshire. She made her one day international debut in 1997 against South Africa and her Test debut in 1999 against India before touring Australia. She scored one test century and nine one day half centuries and developed over her career from a middle order batsman to an opener. She took 12 test wickets and 19 in one day internationals, changing styles from medium pace to off spin over time. She retired from the international game in May 2007, citing the increased pressures of representing her country.