Pc Fletcher was commemorated today at the spot in St James's Square where she was killed on 17 April, 1984. She was 25 when she was gunned down while policing a protest by Libyan dissidents. Her shooting by an assassin inside the building led to an 11-day siege of the embassy. Its occupants claimed diplomatic immunity and were expelled from Britain. In 1999, the Libyan government accepted "general responsibility".