England won the fourth one-day international against South Africa at Lord's on Sunday by six wickets to take a 2-1 lead in the five-match series. England, set 221 for victory, made 224 for four with 20 balls to spare. Ian Bell top-scored with 88, with Eoin Morgan was 36 not out and Craig Kieswetter, who finished the match with a six off fast bowler Dale Steyn, unbeaten on 21. Earlier, South Africa's 220 for eight after losing the toss saw England off-spinner James Tredwell take three wickets for 35 runs in eight overs. The series concludes in Nottingham on Wednesday. Brief scores South Africa 220-8, 50 overs (J Tredwell 3-35) England 224-4, 46.4 overs (I Bell 88) Result: England won by six wickets Series: England lead five-match series 2-1