Far-right parties have rattled traditional powers in the European Union following recent parliamentary elections.

French President Emmanuel Macron has called a snap election after exit polls put Marine Le Pen's far-right National Rally party well ahead of pro-European centrists.

Meanwhile, the far-right Alternative for Germany party is in second place in their vote, ahead of centre-left Social Democrats - with the Conservatives in the lead by a distance.

UK correspondent Gavin Grey says increased concerns about immigration have helped these parties get ahead.

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