July 7 bombing victims remembered

At the same time, victims' families and survivors gathered at stations affected by the outrage.

At around 8.50am on July 7 2005, there were three almost simultaneous explosions on the Underground as terrorists perpetrated the single worst atrocity on British soil.

The Prime Minister and the Mayor of London were among those who paid their respects in a short, sombre ceremony at the memorial in Hyde Park, central London.

In a note attached to his wreath, Mr Cameron wrote: "To the victims of terrorism in London 10 years ago today. We grieve your loss and will honour your memory forever."

Speaking before the service, Mr Johnson said the four suicide bombers had "failed in their aim".

He said the terrorists "didn't in any way change the fundamentals of London and what makes this city great", adding: "Indeed, it's gone from strength to strength in the 10 years since.

"I think most people would say that London has become even more cosmopolitan, even more welcoming."

In a note on his wreath the Mayor of London wrote: "Ten years may have passed, but London's memory is undimmed. We honour again today the victims of 7/7. You will live forever in the hearts of the people of this city."

They were joined at the service by Metropolitan Police Commissioner Sir Bernard Hogan-Howe, transport commissioner Sir Peter Hendy, speaker of the House of Commons John Bercow and MP Harriet Harman.

At Edgware Road station, survivors laid flowers and gathered alongside families of victims in the ticket hall for a minute's silence at 8.50am.

Wreaths and bouquets were laid in front of a plaque which commemorates the attack. A man stood, with his head in his hands, silently crying, as he remembered the victims. A woman walked from the crowd wiping away tears.

Flowers were laid and silences were observed at King's Cross and Aldgate, which were also affected by the attacks 10 years ago.

A service has also taken place at Tavistock Square, where a fourth bomb was detonated on a number 30 bus just under an hour after the three blasts on the Underground.

A minute's silence was held, candles were lit and the names of the those killed were read out.

Later a national minute's silence will be observed at 11.30am during a service at St Paul's Cathedral, which will be attended by survivors and victims' relatives.

The moment of quiet will be observed across the capital's public transport network. Announcements will be halted and bus drivers asked to bring vehicles to a stop if they can do so safely.

Tube services will run as normal but passengers will be asked to observe the silence and announcements will be halted for the duration, Transport for London said.

At the Hyde Park memorial later a second service, to be attended by the Duke of Cambridge, will take place featuring music, a series of readings and the laying of flowers.

July 7 2005 had dawned with London still elated from learning the previous day that it had won the 2012 Olympics, but within hours, the country was consumed by horror and grief.

Suicide bombers Mohammed Sidique Khan, 30, Shehzad Tanweer, 22, Hasib Hussain, 18, and Jermaine Lindsay, 19, met at Luton station that morning.

They took a train to King's Cross in London, hugged and separated to carry out their deadly missions.

Within three minutes of 8.50am, Tanweer detonated his bomb at Aldgate, Khan set his device off at Edgware Road and Lindsay blew himself up between King's Cross and Russell Square.

Hussain detonated his device on a number 30 bus at Tavistock Square at 9.47am.

Twenty-six died in the bombing at Russell Square on the Piccadilly line, six in the bombing at Edgware Road on the Circle line, seven in the bombing at Aldgate on the Circle line, and 13 in the bombing on the bus at Tavistock Square.

A fortnight later, another four would-be suicide bombers launched failed attacks on the Tube and a bus, leading to police marksmen killing innocent Brazilian Jean Charles de Menezes.