Latest: Russian Embassy accuse British media of 'anti-Russian campaign' amid ex-spy investigation

Latest: The Russian Embassy said in a statement: "The situation regarding the hospitalisation of Sergei Skripal and another person on March 4, as described by the British media, causes serious concern.

Update 4.30pm: The Russian Embassy said in a statement: "The situation regarding the hospitalisation of Sergei Skripal and another person on March 4, as described by the British media, causes serious concern.

"As of today, the police or other British authorities have not provided the Embassy with any official information regarding this incident. The Foreign Office has not given any notifications either.