The Environment Agency has withdrawn staff from flood-hit Wraysbury in Berkshire after they suffered "abuse", the GMB union has said.
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Elsewhere it will be largely sunny, though with gusty winds at times, and a few showers likely in places.
Heavy rain has caused widespread flooding and travel disruption across north west England and North Wales.
The actor said he did not remember the latest allegation, but apologised for “inadvertently” causing discomfort.