Peter John William Ward was the son of Hector W Ward and Florrie W Jones. He certainly had one brother, Frederick Duncan Ward 1927 - 2007 but with such common names don't know if there were any more.
Peter appears to have married twice to a Jean B Wilson in 1956 and a Judith Poulton (nee Hubbard) in 1990. Jean remarried in 1968 (John Brenchley). Again names are too common to know if he had children with Jean.
Frederick may have married a Joyce M French in 1956 and there are 3 Ward/French births registered but don't know if they are theirs.