Thousands of families faced huge disruption today, as schools closed right across the capital. Teachers from two unions walked out in an ongoing battle over pay and conditions.
As they marched on Parliament to protest to the Government, parents were forced to make alternative arrangements for their children. Luke Hanrahan reports.
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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.