Complex sentence: He was appointed Constable of the Tower of London from 1 August 1970, Lord Lieutenant of Devon from 5 October 1978 and a Knight of the Garter on 23 April 1980.
Split into simpler sentences: He was appointed Constable of the Tower of London from 1 August 1970 and Lord Lieutenant of Devon from 5 October 1978. He also became a Knight of the Garter on 23 April 1980.