My grandfather joined the army on 4 Jan 1915 and two days later was discharged for being under age. His regiment no. was S7766 and regiment was listed as Gen Service R Brigade. The papers stated he was 18 yrs and 4 months and he signed up at Arlesford.

My father remembers playing with his medals, although he was only 3 years old when his father died in 1928 , so I presume he rejoined at a later date.

Would he have kept his regiment number throughout his service history or would he have been given a new number when he rejoined? I can find no other records for him but allegedly he came into contact with mustard gas some time during his service.

Any help would be much appreciated.