London mayor Boris Johnson has welcomed investment into the Battersea Power Station, which begun reconstruction today. Mr Johnson said that there is "massive confidence and interest" in London from all around the world.
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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.