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 . 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 .