Production will cease today at a lamb processing plant on Anglesey with the loss of 310 jobs.
The future of the Welsh Country Foods site at Gaerwen was thrown into doubt in January, after supermarket chain Asda ended its order for lamb.
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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.