The 1911 Census gives him, wife and nine children. Start with checking Free BMD for the marriage certificate which will give wife's maiden name and father, then for the children's birth certificates. This search gives hints for other records so you can move on to, the childrens' marriages and deaths. At least one, Robert seems to be on the UK Roll of Honour for WW2, Charles died in Croydon when he was 4. Percy seems to have had an obituary notice in the Times (check index) having died in 2002, Joseph seems to have married in Croydon in 1934, ref. 2a 712. Plenty of information if you work methodically from what you know - the 1911 census.