Plaid Cymru’s triumph in the Caerphilly Senedd by-election is a “reset for Welsh politics”, said the party’s leader, Rhun ap Iorwerth.

The Welsh nationalists got 47% of the vote in a record turnout of 50%. Reform UK came second on 36% and Labour a distant third with 11%. Here are five things we learned from a historic night in south Wales.

UK politics is evolving

The result was terrible for the “two big beasts of Westminster politics”, said political editor Chris Mason on the BBC . Labour was “humbled, pummelled, crushed”, while the Tories got just 2%. “Yes, you read that right,” – they “managed just 13% of the vote between them”.

So the “key lesson” from Caerphilly for “every political leader” is that UK politics is “moving at speed, with voter loyalties shifting and atomising in

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