Ange Postecoglou "desperation" as he blasted the board for a lack of ambition. Talks with Eddie Howe broke down last week and the Parkhead club have moved quickly to secure an alternative.
Greek-Australian boss Postecoglou is set to be appointed within days as he awaits permission to jet in from Japan. But Nicholas has been left fearing the worst for his old club as he blamed the board for getting in to this situation.
He wrote in his Daily Express column: "The impending appointment of Ange Postecoglou is hardly a statement of intent from Celtic. "There's nothing wrong with having a plan B - but this is not plan B.
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