Putin demands inquiry into Salisbury nerve agent attack

Vladimir Putin says he wants an inquiry into the Salisbury nerve agent attack, citing a Sky News interview with the boss of Porton Down.Gary Aitkenhead, chief executive of the Defence Science and Technology Laboratory (DSTL) at Porton Down, told Sky News they hadnot been able to establishwhere the novichok nerve agent used to poison Sergei and Yulia Skripal was made.Speaking in Ankara after talks with Turkish President Recep Tayyip Erdogan, Mr Putin claimed novichok could be made in 20 nations.