Amesbury Novichok poisoning

  1. What is Novichok?

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    Video caption: Germany says there's 'unequivocal proof' that it was used to poison Alexei Navalny

    Germany says there is 'unequivocal proof' that Russian opposition politician Alexei Navalny was poisoned with the nerve agent

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    Video caption: Salisbury Novichok: 'We knew how dangerous and deadly it was'

    Former Russian spy Sergei Skripal and his daughter Yulia were targeted with the nerve agent.

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    Video caption: May: Russia must stop 'destabilising' activities

    Ahead of one-one-one talks with Vladimir Putin, Mrs May speaks about the Novichok poisoning.

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    Video caption: Inside Britain’s top secret research laboratory

    The BBC was given access inside Porton Down, where some of the world's deadliest viruses are researched.