Original: The epithet "German war criminal" and Livingstone's subsequent jibes refer to the Standard's then owners, the Daily Mail and General Trust, which endorsed Oswald Mosley's British Union of Fascists in 1934.
Simplified: The epithet "German war criminal" and Livingstone's subsequent jibes refer to the Standard's owners, the Daily Mail and General Trust, which endorsed Oswald Mosley's Fascists in 1934 and supported Nazism until 1939.