Archaeological finds, discovered at Crossrail worksites across London, are going on show in a special exhibition.
Medieval human bones and a piece of mammoth jaw bone are among the items on display at the Crossrail Tottenham Court Road Visitor Information Centre.
Large-scale excavations are taking part in several places across the capital, as engineers prepare to bore tunnels under the River Thames for the Crossrail train project.
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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.