Scientists warn of nerve agent potency as Salisbury clean-up begins

The residue of the nerve agent used in the attempted murder of the Skripals in Salisbury could still be as potent as it was when it was deployed more than six weeks ago, government scientists believe.Experts responsible for the decontamination effort in the cathedral city said there could still be “hotspots” yet to be discovered where the novichok agent remains in high concentrations.The revelations were made at a public meeting held in Salisbury as new barriers were put in place aro