Luke Robson
born 1 August 1885
  in Killingworth, Northumberland
died 21 March 1921
  in Sunderland, Co. Durham

We know that Sarah's maiden name was Fenton, but that she had the surname Robson when she married Tom Avery. BMD shows that the only Fenton–Robson marriage was to a Luke Robson.

Maureen Brown (Luke's granddaughter) confirms that Luke Robson was Sarah Fenton's husband. She also supplies the date and place of birth.

Maureen gives the following account of Luke's life:
'He worked as a coal miner from age 15 until he joined the Coldstream guards at age 19 in 1904. He was stationed at Westminster for a time. He left the army in 1907 and returned to coal mining, but remained in the reserves until he was called up again when WWI broke out. [...] In 1915 Luke went AWOL from his regiment. He obviously went home because their second son, also called Luke, was born nine months later, in 1916. He did 9 days in detention when he returned. Luke was shot in the hand in 1916 and came home again to recuperate before being sent to The Somme. [...] When Luke came home from the war he was not able to continue coal mining as he had been gassed in France and his health was declining. That is when he and Sarah took over management of the Dubmire Working Men’s Club in Chilton Moor. After Luke died (21st March 1921 in the Pensions War Hospital) Sarah remained as manageress of the club. [...] Luke’s name is on the war memorial in Houghton le Spring and he is listed with the Commonwealth War Graves Commission, which is how I tracked down his and Sarah’s grave.

The death of a Luke Robson, aged 35, is recorded in Sunderland district in the March quarter of 1921 (10a843). Maureen Brown says that he is buried side-by-side with his wife Sarah in Houghton le Spring cemetery.