By Emily Mitchell/Reported by Wendy Cole

London's Wembley stadium rocked last week with names like Peter Gabriel and Bonnie Raitt, and the warm-up man was the Rev. Jesse Jackson. But when Nelson Mandela came on, the crowd of 75,000 roared a seven-minute welcome. With wife Winnie at his side, he raised his fist in salute. Visiting Britain for the first time since his release, he refused to see Prime Minister Margaret Thatcher and criticized her policy of lifting sanctions, thus backing "the South African government by giving it rewards and carrots."