London 2012 organisers, who will stage a dress rehearsal for the Olympic torch relay later this evening, received comforting reassurance from a previous host city over fears of protests. A man who was at the heart of the Vancouver 2010 Winter Olympics has reassured Britain that potential demonstrations are likely to melt away when national excitement takes off during the relay and the Games.The torches, which will be unlit, will travel by train, road and boat between Leicester and Peterborough in central England.The Olympic flame will visit most parts of Britain during its 70-day tour starting on May 19 before returning to the capital for the opening ceremony at the Olympic Stadium in east London on July 27.