Former Feltham prison officer: 'Someone will die soon'
10 July 2013 Last updated at 14:02 BST
A young offenders' institution has been labelled "unacceptably violent" by inspectors who found an "unprecedentedly high" use of batons by staff.
Feltham Prison and Young Offender Institution, in west London, had on average almost two fights or assaults every day over 2012, according to a report by Her Majesty's Inspectorate of Prisons.
Andy Darken, a former prison officer at Feltham, is concerned about the levels of violence.
He told BBC Radio 5 live's Victoria Derbyshire, "I make no bones about it - someone will get seriously injured or there will be a fatality there soon."