Australia have regained the Women's Ashes after defeating England by 20 runs in the second Twenty20 international.
England lost two of the three One Day Internationals in July, as well as the test match earlier this month.
They won the first Twenty20 match on Wednesday, to keep their slim hopes of victory alive, but Friday night's defeat gave Australia an unassailable 10-4 lead.
The final Twenty20 match will be played in Cardiff on Monday.