Complex sentence: During the Second World War, he had been vice-chairman of the Fish Industry Joint Council; in 1949, he was appointed a Commander of the Order of the British Empire and in 1958, he was knighted.
Split into simpler sentences: During the Second World War, he was vice-chairman of the Fish Industry Joint Council. In 1949, he was appointed a Commander of the Order of the British Empire, and in 1958, he was knighted.