Thomas was born in Wolverhampton in 1886, the son of Henry Allan and Emma Johnson. In 1891 he was living with his parents at 110 Alma Street, along with siblings William H. Edith M. and Elsie S.
On 11 December 1915, he enlisted as a Sapper with the Royal Engineers (Transport Branch) (service number WR/343659). His trade was given as carter. His next of kin was his father, Allan Johnson. He was not, however, mobilised, until 16 March 1918, and he does not appear to have served overseas. He was admitted to the military hospital in Chepstow on 28 November 1918 with superficial burns to his face and right hands, but he was discharged on 7 December with “no permanent ill effects”. There is a note in his service record about an accident that occurred, as follows:
2 Jan 1919. Court of enquiry held at the time of the accident Sapper Johnson was on duty and court found the accident was due to negligence on his part.
However, there is no further information about the nature of the accident, although this may be the cause of the burns mentioned above. Thomas was discharged on 5 February 1919.
There is a Thomas L. Johnson marrying a Lillie C. Gilroy in Wolverhampton in 1929, and this is presumably the same man. Thomas died in Wolverhampton in 1939.