Milford Haven Coastguard says a man is being treated for smoke inhalation after his boat caught fire near Aberystwyth this morning
A spokesperson said the boat is believed to be from the area.
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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.