A 65-year-old woman and a 25-year-old arrested on suspicion of encouraging or assisting a suicide are mother and son.
The pensioner and her son were held after police suspected they were planning to take her husband to the Dignitas clinic in Switzerland to commit suicide, according to Press Association sources.
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Warwickshire Police are currently dealing with an "ongoing incident" at Bermuda Park, Nuneaton.
The Labour leader has called the Norwich South MP's remark "completely unacceptable" and says Clive Lewis has personally apologised to him.
Jamie Harron, was arrested in July over the incident in which he said he put his hand on a man's hip to avoid spilling a drink in a bar.