Across the UK, people have been taking time to remember the events of 7 July 2005, when suicide bombers killed 52 people on London's transport network.
A girl adds her flower to a giant flower of remembrance in Regent's Park before the bereaved added yellow flowers to the centre.
It was an emotional day for the hundreds of survivors and relatives of victims who took part in the commemorations.
London Mayor Ken Livingstone and Culture Secretary Tessa Jowell began the commemorations at King's Cross station memorial garden.
Police were on high visibility at King's Cross as commuters flowed through the station undeterred.
London Underground employees observed a one-minute silence outside Russell Square Tube station, ahead of a nationwide silence at noon.
Hundreds of commuters took time out of their morning schedules to pay their respects at King's Cross.
Among those who laid flowers to commemorate last year's attacks was George Psaradakis, the driver of the number 30 bus that was bombed in Tavistock Square.
Gill Hicks [middle], who lost her legs in the bomb at Russell Square, was among those revisiting the station.
In St Paul's Cathedral four candles, representing each of sites of the bombs, were lit.
The events of the day brought strangers together, united in grief. This policewoman and mourner embraced at a service in Regent's Park.
In Beeston, Leeds - linked to three of the bombers - the community paid its respects to the dead, while calling for peace, solidarity and unity.