Hi Highway
I just read your post, and was stunned to find a reference to a Hoey from Dublin. We have some of these too, and I would love to take it further, but on a new topic about Hoeys!
Just for the record though, the records at Kew are for regiments from all of these islands - England, Scotland, Wales and all of Ireland, which during WW1 was all one. These are some of the best sources I have had for my Irish forebears.
I can vouch that there are records for at lewast one William Hoey - I will look again at my copy - and I think two or more.
I will send you a pm when I post so that you know where to find it.
Best wishes.
Emms.