Raymond Leslie Slacke (1908, Blackburn, Lancashire, England -?) was the son of Randal Beresford Slacke (31 Oct 1876, Carrick-On-Suir, County Tipperary, Ireland - 1922, Passmores House, Hatfield Broadoak, Essex, England) and Edith Mary Thwaites (1889, County Cork, Ireland - 1921, Passmores House, Hatfield Broadoak, Essex, England).