South East Wales was a European Parliament constituency covering south eastern Wales, including Gwent and parts of Mid Glamorgan.

Prior to its uniform adoption of proportional representation in 1999, the United Kingdom used first-past-the-post for the European elections in England, Scotland and Wales.

The constituency consisted of the Westminster Parliament constituencies of Aberdare, Abertillery, Bedwellty, Caerphilly, Ebbw Vale, Merthyr Tydfil, Monmouth, Newport, Pontypool, Rhondda.

[1] The constituency was replaced by most of the similarly named South Wales East in 1984.

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