Sarah Elizabeth Wanless
born 25 January 1908
  in Edmondsley?, Co. Durham
died 17 March 2003
  in Stanley

Derek: Known as Sadie to family and friends. 'She was a widow, married name Johnson, but I don't know her maiden name. [...] Son, daughter-in-law, and grandson still alive and living in Stanley: Tom, Doreen, and Graeme respectively. She originated from the same Edmondsley/Sacriston neck of the woods [...] as I think she went to school with Mum—she was certainly a childhood acquaintance of the family.

Maiden name from Alan Coe.