The definition can vary, depending on which constabulary you had in mind. Some are regular, civil police forces where the officers are called constables instead of officers. Some are paramilitary police organizations. Some are made up of soldiers trained for policing duties.
Northern Constabulary was created in 1975.
Cumbria Constabulary was created in 1856.
Berkshire Constabulary ended in 1968.
Berkshire Constabulary was created in 1856.
Norfolk Constabulary was created in 1839.
Gwynedd Constabulary was created in 1950.
Gwynedd Constabulary ended in 1967.
Gloucestershire Constabulary was created in 1839.
Flintshire Constabulary was created in 1856.
Flintshire Constabulary ended in 1967.
Fife Constabulary was created in 1949.
Derbyshire Constabulary was created in 1967.