Mid Glamorgan (Welsh: Morgannwg Ganol) is a preserved county of Wales.From 1974 until 1996 it was also an administrative county with a county council. Mid Glamorgan was formed in 1974 under the Local Government Act 1972.It consisted of part of the former administrative county of Glamorgan and the county borough of Merthyr Tydfil, along with the parishes of Penderyn and …

South Glamorgan (Welsh: De Morgannwg) is a preserved county of Wales.. It was originally formed in 1974 under the Local Government Act 1972, as a county council area.It consisted of the county borough of Cardiff along with the southern part of the administrative county of Glamorgan, and also the parish of St Mellons from Monmouthshire.. These areas were divided between …