How Bizarre, How Bizarre
'Don't turn away' bomber families
Mr Livingstone said it would be offensive to turn people away
Ken Livingstone said they should not be turned away from the 1 November mass at St Paul's Cathedral for the 52 victims.
The event is billed as a service for those who died and a tribute to police, firefighters and paramedics.
Church leaders would like the bombers' families to attend but only with approval from the bereaved and injured.
Speaking at his weekly press conference at City Hall, Mr Livingstone said: "They have to decide if they want to come and share the grief of Londoners and celebrate the lives of those that were killed on the day.
We certainly don't want to hurt the feeling of the people who raised mass murderers.