Police in Tenerife have asked for volunteers to join a large-scale search for missing teenager Jay Slater. The search will take place in Masca – a village where rescue teams have focused their efforts – on Saturday. In a statement, police said: “The Guardia Civil prepares and coordinates a large search to find the young British man missing in the village of Masca. “The collaboration of all those Volunteer Associations is requested: Civil Protection, Firefighters, etc., and even private volunteers who are experts in the abrupt search terrain. “The massive search will be carried out on Saturday,…