England will meet Australia in next week’s Champions Trophy semi-finals after heavy rain in Southampton gave them a 49-run win over Sri Lanka under the Duckworth/Lewis system in their Group D decider on Saturday. Andrew Flintoff struck 104 to steer England to 251 for seven before shining with the ball to help reduce Sri Lanka to 95 for five in the 24th over when rain-ended play for the day to send England through thanks to the complex mathematical system. Brief scores England: 251/7 (M Trescothick 66, A Flintoff 104, P Collingwood 39; Vaas 2/51). Sri Lanka: 95/5 (Jayasuriya 27; Harmison 2/21, Flintoff 2/21). SA, WI must return on SundayLONDON: South Africa and West Indies must return to The Oval on Sunday to complete their Champions Trophy Group B decider after rain continued to blight the tournament. South African opener Herschelle Gibbs returned to form to hit a composed 101 from 135 balls and lead South Africa to 246 for six before rain stopped play for the day with West Indies 20 without loss in reply after six overs. Brief scores South Africa: 246/6 (G Smith 45, H Gibbs 101, J Rudolph 46; Bradshaw 2/40, Gayle 3/50). West Indies: 20