West Ham's new stadium plans propose an innovative gravity stressed design of the roof that enables it, at 84m, to become the largest spanning tensile roof in the world. It will also cover all the seats in the stadium and lock that world-renowned atmosphere in.
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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.