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Merthyr Tydfil (UK Parliament constituency)

Merthyr Tydfil
Former Borough constituency
for the House of Commons
18321918
Replaced by Merthyr
Aberdare
Created from Glamorgan
19501983
Replaced by Merthyr Tydfil and Rhymney
Created from Merthyr

Merthyr Tydfil was a parliamentary constituency centred on the town of Merthyr Tydfil in Glamorgan. From 1832 to 1868 it returned one Member of Parliament to the House of Commons of the Parliament of the United Kingdom, and in 1868 this was increased to two members. The two-member constituency was abolished for the 1918 general election.

A single-member constituency (known as Merthyr) existed from 1918 until 1945 and, by the 1950 general election, it had been renamed Merthyr Tydfil. The constituency was abolished for the 1983 general election, when it was largely replaced by the new Merthyr Tydfil and Rhymney constituency.

Merthyr was regarded as a Liberal seat throughout the nineteenth century and particularly after the landmark election of 1868. There were tensions within the constituency, however and these were manifested by the rivalry between Merthyr and Aberdare, which became more pronounced as the latter grew in importance after 1850. Increasingly, also, the constituency was affected by the debate about working-class representation. Thomas Halliday contested Merthyr as a 'labour' candidate as early as 1874 and the return of Keir Hardie in 1900 was a notable landmark in the growth of the Labour Party. From 1922 onwards, Merthyr was a safe Labour seat.

The Great Reform Act of 1832 was the first significant review of the arrangements for the election of MPs to the House of Commons, Patterns of representation had remained essentially unchanged for centuries and no recognition was given to the growth of urban settlements in the wake of the industrial revolution. The discontent of the late 1820s, culminating in serious disturbances in 1831, including the Merthyr Rising persuaded the government to take action in favour of reform. Within the Act of 1832 the one significant change in Wales was the carving out of a new parliamentary constituency, centred at Merthyr Tydfil, from the county of Glamorgan.


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