Complex sentence: His father was the Hon. George Charles Colville, who was secretary of the Institute of Chartered Accountantsand the younger son of Charles Colville, 1st Viscount Colville of Culross, a Conservative politician who served as Master of the Buckhounds and Tory Chief Whip.
Split into simpler sentences: His father was the Hon. George Charles Colville, and was secretary of the Institute of Chartered Accountants. He was the younger son of Charles Colville, 1st Viscount Colville of Culross, a Conservative politician who served as Master of the Buckhounds and Tory Chief Whip.