Thanks to you both for the help.
The information i have is:
Jack Wellington Hirst, Son of John William Hirst & Lettie Hirst (Earle). B:1915.
John William Hirst (B:1878) was a widower, previously married to Catherine Birmingham.
After Catherine's death, He remarried Lettie Earle of Hawk Street, Huddersfield.
John William was resident at "Lee & Burleys yard" which was a run-down area of Thomas Street under the parish of St Marks Church (Behind the sports centre)
They were resident at 33 Northumberland Street, Huddersfield, in 1915.
The whole area has since gone into history with nothing but the church standing.
What is confusing me is,...Lettie remarried in 1940, to a man called Tommy Foley.
....What happened to John William Hirst?