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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.