Find Ancestors

Hi I am trying to find out more information of the Robertsons in my tree. My Gt Grandfather was JOHN RICHARD ROBERTSON B 1885 D 23/11/1951 AGED 66 and was living at 91 Borough Rd, Southwark at time of death he married a AMY KIMBERLEY and they had 5 children AMY, NELLIE, JOHN, ARTHUR AND ERNEST. When my father John was born they were living at 17 Garden Row, Southwark. JOHN was born 27/8/1910 d 17/3/1993 My father was married twice first marriage was to JESSIE EDITH POUT and they had 4 children, JEAN JOYCE PAMELIA AND JOHN. John was born 23/4/1940 at County Hosp. Farnborough and lived at 95 St. Keverne Rd, Chislehurst. Before the divorce came through Jessie died and my father married my mother MARY MARGARET BRADLEY-SMITH on the 3/4/1947 and they had 5 children WILLIAM B 1948, MARGARET B1949, RUTH B 1952, ELAINE B1954 AND DONALD B1957. We came to Australia in 1959. Would like to catch up with Joyce, Pam or John as I haven't heard anything about them since 1970 when my grandmother [Mum's side] died.