BRITAIN rejected a Russian proposal today for a joint investigation into the poisoning of former double agent Sergei Skripal and his daughter in Salisbury.

Russia made the suggestion at an emergency meeting of the Organisation for the Prohibition of Chemical Weapons (OPCW).

It had called the emergency meeting following revelations yesterday by the chief executive of Britain’s Defence Science and Technology Laboratory at Porton Down that scientists were not able to determine where the nerve agent used on the Skripals had been manufactured.