The trial of the man charged with the murder of PC Keith Blakelock during the Broadwater Farm riots in 1985 is about to begin at Old Bailey. The man charged, Nicholas Conrad Jacobs, denies a single count of murder.
The jury is made up of 7 men and 5 women. It is alleged that the defendant was armed with a knife and was part of the group that attacked PC Blakelock.
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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.