Sam's father Peter Woodhead thanked all the people who found his son: "We have just had so much support from friends and family. I would like to put on air the thanks we give to everyone who joined in their search effort. He owes his life to them."
More top news
MI5 face mounting pressure over claims the IS executioner 'Jihadi John', named yesterday as a London graduate, was known to them
Labour leader Ed Miliband is due to set out his party's plans on how it would cut tuition fees.
New drug driving laws are to come into effect next week, including laws on some prescribed medications.