'Absolute evidence' needed in Salisbury case

Jeremy Corbyn has said he still wants to see "incontrovertible evidence" that Russia was behind the poisoning of Sergei and Yulia Skripal in Salisbury.

Asked if that meant he doubted who was responsible, the Labour leader said he believed it was "very clear" the nerve agent was "very similar" to those made in Russia but said "absolute evidence" was still needed.