Ken Livingstone, the mayor of London, tells the BBC that the terror threats to his city mainly come from disorganized groups of disaffected people.

An excerpt:

Ken Livingstone told the BBC London was not the focus of a "great organised international conspiracy with orders flowing down the chain".

But he said there had been 10 attempted attacks since 11 September 2001, two of which had come since the 7 July bombs.

MPs recently stated a "deadly threat" to the UK's transport system remained.

Mr Livingstone, speaking on Radio 4's PM programme, said there had been "a couple" of attempted attacks since suicide bombers killed 52 people on London's Tubes and a bus on 7 July.

He added there were eight other attempts between the 11 September attacks on the US and 7 July this year.