Thomas was born in Wolverhampton in 1892, the son of Thomas and Eliza Annie Coombs. In 1901, they were living at the back of 9 Dudley Street, Bilston, along with Thomas’s siblings Martha, Ada Florence, Amy, William Harold, Ernest and Wilfred Cross. By 1911, the family had moved to Newport, Wales, and had an additional child, Alice Maud. Thomas was working as an iron worker breaker down at a sheet iron mills.
Thomas enlisted with the 1st Battalion of the Monmouthshire Regiment (service number 2756), and became a Lance Corporal. He was killed in action on 13 October 1915 on the Hohenzollern Redoubt. He is remembered on the Loos Memorial.