In this regard, as the Full Court held in Bradken Limited v Norcast S.AR.L [2013] FCAFC 123;  (2013) 219 FCR 101at  [2]:

… the exercise of the power to allow an appeal by consent is dependent upon the identification, to the satisfaction of the Court, of arguable appellable error in the decision below.

(at [9] CQX18 v Minister for Home Affairs  [2019] FCAFC 142)