Ben Needham's mum: 'Someone knows' what happened
Kerry Needham has told BBC News that "someone knows" what happened to her son Ben, who went missing on the Greek island of Kos in 1991 when he was 21 months old.
Officers from South Yorkshire Police have travelled there to make a fresh appeal to local people and follow up lines of inquiry.
They have offered a reward of 12,500 euros (£9,800).