Wormsley: England held their nerve for the second time in three days to win another last-ball thriller at Wormsley and took a 4-0 lead against Australia in the five-match encounter.
Laura Marsh had seen her side through to a series win during a tense finish at Stratford on Friday and she was in the middle again, holding her nerve for the victory.
The groundwork for the win, though, had been laid by Charlotte Edwards and Lydia Greenway, both of whom scored half-centuries.
Australia, riding on Shelly Nitschke's fifty, had achieved a total of 225 for 7 and their bowlers had started brightly, taking three wickets for 14 runs to reduce England to 78 for 4.
The chase was revived by Edwards and Greenway, who scored 65 and 50 respectively and added 113 for the fifth wicket to put the chase back on track.
Brief Score: England 226 for 8 (Edwards 65, Greenway 50, Andrews 4-50) beat Australia 225 for 7 (Nitschke 71, Rolton 52) by two wickets.