A worker at Newport manufacturing company Rowecord has told ITV News that "a couple of hundred" jobs are being lost.
He said that many workers were told they were being made redundant half an hour ago.
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Rain clipping the far north through the evening but elsewhere staying dry with some sunny spells.
Public Health Wales figures show 25 more cases of the virus have also been confirmed.
Photos taken on Saturday morning show Roald Dahl Plass strewn with empty beer bottles and discarded canisters of laughing gas.