On the morning of September 14 2007, 14 year old Andrew Gosden walked out of his home in Balby, a suburb of Doncaster, South Yorkshire, took £200 from his bank account and purchased a one way ticket to London. CCTV footage captured Andrew leaving Kings Cross Station in London at 11:25am, and this would be the last confirmed sighting of Andrew. 

Sources:
https://docs.google.com/document/d/1q9FGRDB2-o4bbxomST4CRnvYwAEFbv03O-5c0zqSjX4/edit?usp=sharing