« Reply #13 on: Monday 27 May 19 15:00 BST (UK) »
If you want you can send me a PM (personal message - press the green scroll symbol underneath my username in the left margin) and I can help you look for a service record. Unfortunately many records from WW1 don’t survive, but I agree it is well worth a look.
I have just seen what you said about the circumstances of conception/birth. That must make it much less likely that the child was named after the natural father. Have you looked in the British Newspaper Archive (or Findmypast) for any relevant press reports?
Ayr: Barnes, Wylie
Caithness: MacGregor
Essex: Eldred (Pebmarsh)
Gloucs: Timbrell (Winchcomb)
Hants: Stares (Wickham)
Lincs: Maw, Jackson (Epworth, Belton)
London: Pierce
Suffolk: Markham (Framlingham)
Surrey: Gosling (Richmond)
Wilts: Matthews, Tarrant (Calne, Preshute)
Worcs: Milward (Redditch)
Yorks: Beaumont, Crook, Moore, Styring (Huddersfield); Middleton (Church Fenton); Exley, Gelder (High Hoyland); Barnes, Birchinall (Sheffield); Kenyon, Wood (Cumberworth/Denby Dale)