Hi, thanks for your reply, I think the building is of Georgian origin perhaps turn of the 18th and 19th century, a short quote from Wikipedia Unlike police elsewhere in the United Kingdom, RIC constables were routinely armed (including with carbines) and billeted in barracks, and the force had a militaristic structure.
There were rules about who could serve in a specific region and who was allowed and when a member of the police force could marry, Constables were routinely moved around the county to avoid forming relationships with locals, so a barracks would serve as living quarters for the force.