A report claims that Wormwood Scrubs prison is 'on a knife-edge', with staff revealing they have "never felt so fearful". Details have been released in the prison's annual report.
One extract of the report by the Independent Monitoring Board says: "Cuts in staff not only negatively affect the Ministry of Justice's key incentive to rehabilitate prisoners. The absence of one or two prison officers due to illness or holidays can have a huge impact on the prison regime."
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Pictures of today's events unfolding following a major security incident at the Houses of Parliament.
At least two people have died after a knifeman brought terror to the heart of Westminster.
The Cobra committee brings together government ministers with senior officials of the emergency services and security agencies.