Thanks for all the help,
I believe one of them men could be my great granddad, I have his medals from the first world war that have R.H.A on them and my thinking was that it stood for Royal Horse Artillery, so upon seeing the cap badge thought that if this was from the right period then one could be him. I shall have to look into accessing his war records or keep looking and see if I can find a named photo somewhere.
Thanks again,
Jack
Edit: Turns out I didn't read R.H.A. off a medal but rather off one of the record office forms that accompanied one. And it turns out the full text was actually R.H. & R.F.A. So it appears that I can't read. He was in the field artillery and I have found his record online in various places but you have to pay to see it. Are some sites better than others in terms of information given or are they all the same?
Sorry for the mistake,
Regards,
Jack