Reflecting the increased importance and wealth of Merthyr the borough was given a second MP after the Reform Act 1867 .
The Act increased the number of MPs for Glamorganshire from one to two , it created the separate District of Swansea and Merthyr Tydfil became a borough constituency .
Reflecting the increased importance and wealth of Merthyr Tydfil the borough was given a second MP after the Reform Act 1867 .
The Act increased the number of MPs for Glamorganshire from one to two , it created the separate District of Swansea and Merthyr Tydfil became a borough constituency .