The family of a hiker who disappeared while trekking in Nepal have launched a new scheme to help track down other walkers that might go missing.
Gareth Koch has not been seen since March 2004
Gareth Koch, from Wantage in Oxfordshire, was 24 when he failed to return from his holiday in the country as expected on 20 March 2004.
His parents, David and Gill, have created "trekker intention" books to be placed in hostels in the area.
They can be used to log personal details and visitors' destinations.
In a foreword to the book, Mr Koch's father said: "If the missing person's name, date and intended path has been recorded in the lodges where they stayed then much valuable information has already been gained.
"As the family and friends of David know, anything to help make their search quicker and simpler is important."
His son went missing when he and fellow walker Ian Napier went their separate ways.
He was last seen on 7 March by two Germans.