'Robust' response promised for future protests in London

The new head of public order policing in London has promised a "robust" response if there are more violent protests in 2011.

Assistant Commissioner Lynne Owens has told the BBC there are no plans for continental-style use of water cannon.

But, in her first TV interview since taking on the job, she said that violence on the streets of the capital would never be tolerated.

Andy Tighe reports.