A missing persons expert has called for "urgent action" to "unanswered questions" in the search for missing teen Jay Slater, as efforts to find him have reached their third day.

Slater disappeared whilst on holiday on the island with friends, having attended the NRG music festival. He was last seen getting into a silver car with those he had met at the festival, before ringing his friend Lucy the morning after to tell her he was on his way home after missing the bus.