The city came to a standstill at 11:30am for a minute of respectful silence.
At Tube stations across town and in the middle of the street, people stopped to observe a minute's silence for the victims of the 7/7 bombings.
A memorial service began at St. Paul's Cathedral.
BBC News are paying tribute to each of the 52 victims, one by one.
Because each victim was an individual, with a life and family and friends.