Police 'focus too much on kettling', says Liberty
18 April 2011 Last updated at 06:50 BST
Senior police officers focused too much on the potential use of "kettling" during the TUC march against government spending cuts in London last month, human rights campaigners have said.
A review by 120 legal observers from Liberty said the containment tactic was "under near constant consideration" when potential trouble spots emerged.
Danny Shaw reports.