The international chemical weapons watchdog has backed Britain’s findings on the identity of the chemical used in the Salisbury nerve agent attack. The Organisation for the Prohibition of Chemical Weapons said an analysis of samples taken from the Russian former spy Sergei Skripal, his daughter Yulia, and Det Sgt Nick Bailey confirmed the assessment of the UK, which has said that the three were affected by novichok, a military grade nerve agent developed by Russia. The executive summary released by the OPCW does not mention novichok by name, but states: “The results of the analysis by the OPCW designated laboratories...