Emergency and transport staff have been honoured for their brave actions on 7 July during a ceremony at City Hall.
52 people were killed and hundreds injured in the July bombs
The Metropolitan, City and British Transport Police, London Fire Brigade, and bus and Tube workers were thanked for their work during the bombings.
London Ambulance, Air Ambulance and the hospitals which received bomb victims were also recognised.
London mayor Ken Livingstone, who made the presentations, said they had shown extraordinary courage.
Two people from each service collected a plaque on behalf of their colleagues and Prime Minister Tony Blair sent a message to be read out.
Among those attending was Commissioner of the Metropolitan Police Sir Ian Blair and Transport for London (TfL) managing director Tim O'Toole.
Mr Livingstone said: "The thank you event is being organised to express the gratitude of all Londoners to the emergency service and transport workers, who showed extraordinary courage in coming to the aid of everyone immediately affected on 7 July."
The attacks by four suicide bombers killed 52 people and injured hundreds.
Earlier this month, 96 British Transport Police officers received awards for showing "special zeal, courage, skill and resourcefulness" on 7 July.