A top scientist has told of the moment his blood ran “cold” when he learned the deadly nerve agent Novichok had been discovered in Salisbury.Professor Tim Atkins, a senior scientific adviser to emergency services dealing with chemical and biological materials, said he had to step outside for air while he tried to comprehend the discovery made by his colleagues at the Defence Science and Technology Laboratory (Dstl) based at Porton Down near the Wiltshire city.
