Police say a 20-year-old man from the West Midlands is missing in Shropshire after he "got into difficulty" while in the River Severn with friends last night.
A full search was carried out last night and suspended due to poor light. It resumed again early this morning.
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Fog patches and extensive low cloud at first will steadily lift and clear.
A murky start with mist and fog then gradually clearing, although some eastern coastal districts may remain cloudier.
Isolated showers should die out through the evening to leave a dry remainder of the night.