WW1 Hugh Galt

[Alba10]

Hugh Galt WW1 is the witness signature on my great uncles Soldier's Will, Hugh and his family are from Stewarton in Ayrshire, below is some information on Hugh also naming his parents, his mother was Mary.  If anyone can help or suggest some way of contacting any living relatives of Hugh I'd be very grateful, I would like to send them a copy of this Will with Hugh's own signature.

Thanks
Alba

Regiment/Service: Seaforth Highlanders 8th Bn.
Panel Reference: Panel 112 to 115.
Memorial: LOOS MEMORIAL
Additional Information: Son of Mr. and Mrs. James Galt, of 28, Rigg St., Stewarton, Ayrshire.

SNWM
Surname: GALT
First Name: Hugh
Service Number: S/5467
Date Death: 25/09/1915
Place of birth: Stewarton Ayrshire
Other: 8th Bn.
SNWM roll: THE SEAFORTH HIGHLANDERS
Rank: A/Cpl
Theatre of death: F.& F.

[Southhook]

Hugh GALT (1880-1915) was my paternal grandmother Mary's younger brother, so he is my great uncle too. Her gravestone is located in St Maurs churchyard. Kilmaurs.
The Stewarton Historical Society has helped me with gathering some more background information, including his death 100 years ago in the Battle of Loos.
I am making a personal visit to Loos on the centenary of Hugh's death, 25th September 2015.
It would be most interesting to see a copy of his Soldier's Will, as I have managed to access a couple of Hugh's military service records through the Ancestry website.
I look forward to seeing your reply.