I know he was the son of Joseph Henry Mowe and Ellen Mowe, both of 4 Lingholme Road, St Helens. William was born in March 1896. He was still registered as living there during WW1 as his name appears on the AVL.
I have found him on the 1911 Census and via the St Helens Cemetery search, the burial place of his parents and maternal grand parents. I can not however find when he died or where he was buried/cremated.
All his male relatives seemed to work for Pilkingtons and my assumption is that he was also employed by the company.
I have as yet been unable to find any mention of him in the local papers.

Williams medals: from left to right, top to bottom.
Military Medal, British War Medal
Victory Medal, Meritorious Service Medal