Consequently, in law an appeal which requires the prior leave of Court but was filed without the requisite leave of Court is wholly and completely incompetent. It would have no redeeming feature to be considered on the merit no matter how tempting the zeal to do substantial justice on the merit to the parties may be. See Sections 240; 243 (1), (2) and (4); 254C (5) and (6) 3(2) of the Constitution of Nigeria 1999 (as amended). See also Skye Bank v. Iwu (supra).
— B.A. Georgewill, JCA. University of Lagos v. Mbaso (2018) – CA/L/775/2016