Info from http://warmemscot.s4.bizhat.com/warmemscot-ftopic3144-30.html

John Beattie, 25 years, 5 months, born Port Glasgow, Renfrewshire. 

Joiner, employed by Dick and Benzie. 
Home address; 259, Crookston Street. 
Single.

1901 Census Glasgow, Blythswood, 150 Holm Street, recorded (transcription):- John Beattie(11), Scholar, son, born Renfrewshire, Port Glasgow; John Beattie (44), Tailor, born Lanarks., Airdrie; Catherine Beattie (48 ), Wife, born Bute., Mt. Stewart. 
1891 Census Renfrews., Port Glasgow, 2½ Scarlow Street, recorded (transcription):- John Beattie (1), Grandson, born Port Glasgow; John Beattie (34), Tailor, Son-in-Law, born Airdrie; Isabella Beattie (34), Daughter, born Port Glasgow; Mary Barclay (61), Head, Annuitant, born Port Glasgow. (The named Isabella Barclay or Beattie will be John Beattie's mother.) 

enlisted 14/4/1914 served at Gallipoli - was invalided home 15/12/15

Attested Glasgow, 11th. September, 1914. 

Previous service:- R.A.M.C. (T.) 2/L.F.A., Time (served). 
Approved that same day and appointed 1st. L.F.A., R.A.M.C. (T.). Regtl. Nr. 200. 
Parents noted as John Beattie and Catherine Beattie (Step-mother). No other relations. 
On some forms there is a middle initial 'L' written. 
5th. June, 1915 - Mediterranean Expeditionary Force. 
November, 1915 - Gallipoli. Invalided home December, 1915, following treatment at Cairo (stomach infection?). 
Acting Lance=Corporal for some time during his service. 

Disembarked Boulogne 5th. August, 1917 with No. 70 Reinforcements. 
Joined Cyclists's Base Depot, Rouen, 7th. August, 1917. 
Posted to 1/3 H.F.A. in the field, 16th. August, 1917. 

Medal index ticket/Service Award Roll is under original service number:- R.A.M.C. Pte. 200. 
Theatre of War first served in (3) Egypt, 21st. June, 1915. 

Army register of soldier's backpay and War Gratuity records payments to sole legatee John (father). 
John Beattie, R.A.M.C. 1/3 Highland F.Amb.; Pte. 316085; died 23.9.1917, in action France Belgium.