Murder of Lee Rigby 'could not have been prevented'

The murder of Fusilier Lee Rigby could not have been prevented by the intelligence agencies, according to a parliamentary inquiry, despite the names of his killers appearing in seven different agency investigations.

The soldier was killed near Woolwich Barracks in London on 22 May 2013 by Muslim converts Michael Adebolajo and Michael Adebowale, both of whom are now serving life sentences.

The inquiry by the Intelligence and Security Committee highlighted one online exchange in 2012 between Adebowale and an overseas extremist - in which the attacker made clear his intention to murder a soldier in "the most graphic and emotive manner."

But the security services had no access to that exchange - and the internet company failed to alert the authorities.

Lucy Manning reports.