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Ellie Taylor & Anna Whitehouse 10pm - 1am
Government, police and all the key organisations involved in putting on the London Olympics are to face a series of security tests to ensure they're ready for 2012.
A minimum of ten exercises will be staged to test how emergency services respond to a range of incidents.
Searches used to help stop Irish republican terrorists are being deployed by Scotland Yard - to help lock down security at 2012 venues