Nina Gold, the partner of Frank Hewetson, told ITV News all she could do now was to strive for a political or legal solution after he was denied bail.
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His estranged younger brother has been waiting to hear how and when he will be deported to their home country.
Missing Moses, 14, has special needs and has not been seen in the past year.
Police are becoming "increasingly concerned" for the welfare of a missing 76-year-old man from Fulham.