Organizers have agreed to preserve parts of a display of almost a million ceramic poppies filling the Tower of London moat to mark the centenary of World War I.

The temporary installation has generated intense interest, with thousands lining up daily to look. Each of the 888,246 poppies represents a service member from Britain or its empire killed in the Great War.

The poppies are due to be removed on Wednesday, the day after Armistice Day, and sent to people who have bought them in return for donations to military charities.

Prime Minister David Cameron visited the site Saturday, saying it had become a "much loved and respected monument."

Cameron said parts of the display would remain until the end of the month before going on a national tour.