Werth"s family fled to the United Kingdom in the wake of the Russian Revolution. Werth wrote about France in the prewar period and about Russia in World World War II, especially the Battle of Stalingrad and the Siege of He spoke and wrote both Russian and English at the native level His best-known work is Russia at War 1941 to 1945, (London, 1964) a behind-the-scenes look at life in the wartime Soviet Union.
He spent the war there as the British Broadcasting Corporation"s correspondent, and had unrivalled access due to the combination of his British Broadcasting Corporation press credentials and his ability to function as a native Russian speaker.
Werth was among a group of journalists to visit the Majdanek concentration and extermination camp after it had been discovered by the advancing Red Army. He filed a report on the atrocities that had been committed there, but the British Broadcasting Corporation initially refused to broadcast it, believing that it was too incredible to be true and suspecting a Soviet propaganda stunt.
He was the Moscow correspondent for the Guardian newspaper from 1946 to 1949. He was one of the first outsiders to be allowed into Stalingrad after the battle.
Other works include: France 1940-1955: the de Gaulle Revolution.
Moscow 41. The Last Days of Paris: a Journalist"s Diary. Leningrad; The Year of Stalingrad.
Married Freda H. Lendrum, 1931. Married second Aline B. Dawson, 1947.