I have very little on Norman Lang, son of Thomas Lang, other than the following:
Attestation papers suggests he may have been born in 1895. At attestation he was 5'8.5" in height, 139 lbs, good physical development, having been vaccinated (presumably for smallpox) in infancy. Prior to enlisting he was a clerk. He crossed the Channel from Southampton to Le Havre on Oct 3/4 1915. Received 7 days punishment for neglect of duty- leaving a bicyle in a field uncleaned. Demobbed on 24 May 1919. Left France on 02 Jun 1919.
He was a Private in the 36th Ulster Divisional Train Army Service Corps, 253 Company Attached to the 11th Battalion Royal Irish Rifles.. His enlistment number was 036466. He was a Driver. (A train unit apparently was responsible for movement of troops primarily via train).
He died in Londonderry in 1945. I have no info on spouse or children.
Two of his brothers and, possibly, one sister did go to Canada. Christopher settled in Winnipeg. Leonard spent some time in the US then ended up in Canada, where he died. Margaret married a Canadian,Thomas Hunter. Not sure if they lived in Canada or Northern Ireland. She died in Londonderry and he died a few years later in Toronto.
Several of Thomas' siblings went to Canada; brothers Walter, James and George and sister Christina.