He bought out his partners in 1937 and amalgamated The Morning Post with The Daily Telegraph, with himself as chairman and editor-in-chief. His sons Seymour, the 2nd Viscount, and subsequently Michael, continued to run the newspaper until 1986.
Berry was created a Baronet in the 1921 Birthday Honours.[1] He was created the 1st Baron Camrose in 1929 and the 1st Viscount Camrose in 1939.
William Berry provided financial assistance to Sir Winston Churchill after the Second World War. He and another ten wealthy well-wishers each donated £5,000 to the Churchills, allowing them to keep their home, Chartwell, on the condition that it would be presented to the nation upon their deaths.