Mark Bushnell had 'no reason' to go missing
11 March 2014 Last updated at 14:26 GMT
The family and colleagues of a missing private schoolteacher have said they do not know of any reason why he should have disappeared.
Mark Bushnell, a deputy head at the Durham School, left his home on Sunday morning, and his car was later found at a clifftop car park near Peterlee.
A search of the area is continuing.