England beat current series leader South Africa 21-14 in the Cup final at the Tokyo Sevens, round seven of the HSBC Sevens World Series. br br Follow World Rugby on social media: br TWITTER.COMRUGBYWORLDCUP br FACEBOOK.COMRUGBYWORLDCUP br WWW.TWITTER.COMWORLDRUGBY br FACEBOOK.COMWORLDUGBY br INSTAGRAM.