Police teams gather near Blackhall Rocks for a third day as searches for missing Durham School teacher Mark Bushnell continues.
Police investigating disappearance of popular deputy head scale back search and say family "realistic about chances of a positive outcome".
The search for Durham deputy headteacher Mark Bushnell has shifted to a new location after reports he was spotted at a caravan park.
Mark Bushnell, deputy head teacher at Durham School was last seen on Sunday March 9. Concern is growing for him as police search