** FILE ** Britain's Prince William and Kate Middleton watch the England against Italy Six Nation rugby match at Twickenham stadium in London, in this Saturday Feb. 10, 2007 file photo. Prince William and former girlfriend Kate Middleton have resumed their relationship, British newspapers reported Sunday. The couple, who announced in April they had split, attended a party at an army barracks together earlier this month, newspapers claimed. William, 25, has also invited Middleton to attend a memorial concert to his late mother, Princess Diana, to be held at London's Wembley Stadium next Sunday, the Mail on Sunday reported. (AP Photo/Alastair Grant)
June 4, 2011 5:17:12 PM PDT
LONDON (AP) - June 4, 2011 --
Sharp-eyed tourists outside Buckingham Palace had a rare opportunity Saturday to see Prince William on horseback.