I would go for a Barrack Warden:
Barracks Wardens-Pensioners only not under the rank of Sergeant; age under 45, except for Warrant Officers; Character 'Very Good' Wages in addition to Pension, 4s. 3d a day, rising to 5s. 9d a day after 15 years' service as Barrack Warden.
Thay would have been re-cap badge into the General Service Corps. If today he would go on the Long Service list, but keep his Cap Badge & Regt.