Big Ben has chimed non-stop for three minutes to ring in the Olympic Games.
The London landmark was joined by hundreds of churches and other organisations across the nation as bell ringers greeted the official start of London 2012.
The hour bell of the landmark Palace of Westminster clock began chiming at 8.12am. It pealed 40 times over the following three minutes. Special permission had to be gained for the hour bell at the Palace of Westminster to be allowed to toll out of its regular sequence.
It is believed to be the first time that the strike of Big Ben has been rung outside its normal schedule since February 15 1952, when it tolled every minute for 56 strokes for the funeral of King George VI.