Caerphilly is famous for three Cs: coal, cheese and its mighty castle. It's also the birthplace of the legendary comedian Tommy Cooper.

And after Thursday's Senedd by-election, in what was once a Labour stronghold as impregnable as the castle, it's Plaid Cymru or Reform UK that will have the last laugh.

It may not be a Westminster by-election, but this clash will have an impact on UK politics way beyond the Welsh valleys if Nigel Farage's party triumphs.

Image: iStock file pic

A Reform UK victory would strengthen claims that Mr Farage and his insurgents are poised to inflict massive damage on Labour and the Conservatives in elections next year and beyond.

Victory in the valleys would intensify fears among the other parties that Reform UK's boasts about winning the next gener

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