© Licensed to London News Pictures. 07/03/2018. Salisbury, UK. Police in protective suits and gas masks appear to be rehearsing search techniques near Salisbury. Former Russian spy Sergei Skripal and his daughter were taken ill following a suspected poisoning in the city. The couple where found unconscious on bench in Salisbury shopping centre. Authorities now suspect a chemical nerve agent was used. Photo credit: Peter Macdiarmid/LNP