A memorial service was held in London on Wednesday afternoon to mark the anniversary of the September 11 terror attacks in the United States.
Some 2,000 people, including Prime Minister Tony Blair, Prince Charles and friends and relatives of the 67 British victims killedin the terror attacks, attended the service of remembrance held atthe St. Paul's Cathedral.
A minute's silence was held at the service at 1346 BST to mark the moment the first plane hit the World Trade Center one year ago,with the lighting of a candle at 1403 BST to mark the ram by the second plane.
More than 3,000 white rose petals, one for each victim of the terror hijacks, were released from the cathedral's great dome.
Among the guests was US Ambassador William Farish, who referredto Britain as "America's truest friends" who had stood "firmly by our side" in the aftermath of the attacks.
Similar services were held in other parts of the country. More than 1,000 people congregated in Birmingham's Victoria Square for a live address via satellite link-up from New York firefighter Keith Nicocello.
Security has been tightened at several key sites, with some armed roadblocks in London and a no-fly zone in force at key timesacross the capital.