The UK prime minister to try to help a British woman who lives in Bahrain to be reunited with her son Adam, who is being kept in Qatar by the family of her late husband, Adam's father.
Rebecca Jones, said it has been a "tremendous struggle" because of the family's "influence in the country and their knowledge of the justice system".
Speaking to the Today programme, she said her son is "desperate to come home... he's very depressed, he's confused."
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