Thanks for the help Boo,
This is driving me crazy now, I have tried an exact search on William Thomas Dale in the military records on Ancestry with a birth year of 1889 (+/- 1 year) and I'm just not finding the record you are referring to.
I have used the family search site quite a lot for BMD details but had no idea there was a military section, I might have to redo a lot of searches on there now. How do I search it? I am a member of the site.
I got the birth year from a simple bit of maths from a census I was looking at, nothing more than that so I'm sure you are correct about that, especially as Reavley was his mothers maiden name, Isabella Reavley.
Thanks again for the help,
Michael