Hello again Craizi,
If you go to the Commonwealth War Graves commission site
http://www.cwgc.org/ you will get the information below & the service No etc, could help when you search further.
This site might help in your search
http://www.army.mod.uk/contacts/divisions/records.htm but I think that you might have to go in person to get what you want. If you cannot do that then there are researchers who specialise in Army records search.
I hope that is of some help.
Don
1 MUNRO, S F
Rank: Serjeant Major
Service No: 968
Date of Death: 27/09/1915
Age: Unknown
Regiment/Service: Royal Scots
Country: United Kingdom
Grave/Memorial Ref: II. A. 14.
Cemetery/Memorial Name: GREEN HILL CEMETERY