Please forgive me if I seem to be chiding you but, given that you are seeking the help of experienced Rootschatters (i.e. well beyond myself), I do not understand your reticence in disclosing the soldier number for your Norman William
With this key piece of information many fresh sets of eyes & minds on his service record (which I, at least, have not been able to find) may be able to evince a nugget that could lead to the beneficial outcome that you have very long sought.
In my own experience, when I eventually found the WW1 service record for my potential Grandfather, even though he had changed his name and said that he was 5 years older than he was, what was revealed dramatically (and very productively) changed the entire landscape of my research.
By the way, I should have pointed out sooner that the image associated with the earlier blackkalendar link was not that of Norman William. Given that a) he was never convicted and b) that the website had no other information regarding him - it was solely a "stock" image included for effect.
Willyam