'Kettling' at the TUC march in London
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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.