Gordon Brown, the British prime minister, has laid flowers to mark the second anniversary of the death of 52 people in the July 7, 2005 suicide bombings on London's public transport system.
Brown, accompanied by government ministers, delivered the wreaths at about 0750 GMT - the time London's transport system was shut down after the attacks.
The ceremony at King's Cross railway station on Saturday was low-key, reportedly at the wish of the families of those killed.
A total of 52 commuters and four British suicide bombers were killed when bombs exploded on three London underground trains and one bus in quick succession.
The attacks caused the biggest peacetime loss of life in Britain since the Second World War.
Beverli Rhodes, 46, was on one of the trains when a bomb exploded. She was thrown against a metal pole and suffered brain damage. She says she's still haunted by the bombings.
"I [still] won't go on the underground," she said.
"It's amazing that it was two years ago," John Salding, 63, whose girlfriend was amongst those killed, said.
"My memories are all so fresh."