The decision over whether to grant planning permission for a potash mine under the North York Moors has been deferred for a third time.
York Potash has asked the National Park Authority for more time to submit environmental information.
A new date to consider the application has yet to be fixed.
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Callum Young, who will now be 23, was last seen on August 27 last year at his home in Hylton Road.
Gunner Paul Ferguson was on leave from the Army when he died in the early hours of Sunday August 21.
Dutch International Darryl Janmaat left for Watford, USA's DeAndre Yedlin arrived from Spurs and Tim Krul left for a season's loan at Ajax.