Sir Peter married Judith Hempson in 1939: they had a son and four daughters. Sir Peter was succeeded as Baronet by his son Samuel, married to Georgina Cory since 1977. Lady Roberts and Sir Samuel run the Cockley Cley Estate near Swaffham. Lady Roberts became the first woman Chairman of the Norfolk Country Landowners Association.[1]
Craig, F. W. S. (1983) [1969]. British parliamentary election results 1918-1949 (3rd ed.). Chichester: Parliamentary Research Services. ISBN0-900178-06-X.