Inspectors from the Organisation for the Prohibition of Chemical Weapons (OPCW) have today been working alongside police in Salisbury. Experts arrived in the UK on Monday to collect samples of the nerve agent used in the poisoning of former Russian spy Sergei Skripal and his daughter Yulia earlier this month. Report by Chulanin. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn