An Abbey Wood teenager missing for six weeks could be in Southend-on-Sea, Bexley, Deptford or Ipswich.
Joe McCarthy, 16, was last seen on July 4 in Deptford, police say.
He is described as medium build, 5ft 7 ins tall, with short dark hair. Joe, who has been missing before, was wearing a black top with a hood, black tracksuit trousers and white trainers.
PC Rhianne Trill from Greenwich police said: "Although Joe has been seen by his family and explained that he doesn’t want to come home, both police and his family remain concerned for his welfare."
Anyone with information should contact the PC Rhianne Trill on 020 8284 7713 or on 101 quoting reference 14MIS021341.