The Unite Union will today start consultations with electronics giants Sharp after the firm's announcement it'll stop making solar panels at its factory in Wrexham.
Bosses have blamed "unavoidable market conditions" for their decision.
Two hundred and fifty posts will be shed. It also won't renew around 350 agency workers' contracts.
Microwave ovens will still be made there.
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Port Talbot-born Michael Sheen is calling for more support for children from poorer backgrounds to study drama at schools.
The area came fourth behind Peru, New Zealand and Portugal.
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