Mass search for missing Briton Jay Slater begins in Tenerife

Volunteers helping police in search of rocky wildness close to where teenager went missing

A mass search" for the missing teenager Jay Slater has begun in Tenerife after police called for volunteers to take part.

Slater, from Oswaldtwistle in Lancashire, was last heard from on the morning of Monday 17 June when he called a friend to say he had no water and only 1% battery left on his phone.