Kettling protesters is lawful, appeal court rules—Metropolitan police win appeal against high court ruling criticising violent tactics at the G20 protest in 2009 (Guardian, link): http://www.guardian.co.uk/uk/2012/jan/19/kettling-protesters-lawful-appeal-court/print and see: Full text of the judgment: http://www.statewatch.org/news/2012/jan/uk-kettling-judgment-full-text.pdf