Guardian's Paul Lewis interviewed on BBC's Newsnight tells how journalists covering the rioting were attacked in Hackney.
He said a colleague was beaten to the ground.
Lewis doing great reporting via Twitter @PaulLewis of riots in North London, moving from Hackney to Chalk Farm in Camden.
Satellite TV vans withdrawn from Croydon after coming under attack.
Vivid reporting on Twitter of rioting in Croydon by Croydon Advertiser's Gareth Davies @Gareth Davies09