Around 70 firefighters are tackling a blaze at a factory in Greenwich. Smoke can be seen across south-east London. There are swimming pool chemicals involved and people in the vicinity are being advised to keep windows and doors shut.
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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.