By Antony Clements-Thrower Prince William joked with a young fan who was waiting to see him – but seemingly had trouble recognising him up close. The Prince of Wales was filmed meeting and greeting the public during a walkabout in Windsor shortly after the King’s Coronation. He came across a young royal fan who had eagerly been awaiting the arrival of the heir to the throne – even if he was not entirely sure what he looked like. In the sweet exchange, the lad asked him: “How long until we are going to be able to see Prince William?” The prince, eager not to embarrass the boy, winked at his mot…