It has since been established by a plethora of authorities that the appropriate time at which a party to proceedings should raise an objection based on procedural irregularity is at the commencement of the proceedings or at the time when the irregularity arises. If the party sleeps on that right and allows the proceedings to continue on the irregularity to finality, then the party cannot be heard to complain, at the concluding stage of the proceedings or on appeal thereafter that there was a procedural irregularity which vitiated the proceedings- See C.F.A.O. v. The Onitsha Industries Ltd. 11 N.L.R. 102 at p.103; Johnson v. Aderemi & Ors. 13 W.A.C.A. 297; Adebayo & Ors. v. Chief Shonowo & Ors. (1969) 1 All N.L.R. 176 at p.190; Ashiru Noibi v. Fikolati & Anor. (1987) 1 N.W.L.R. (Part 52) 619 at p. 632 and Ezomo v. Oyakhire (1985) 1 N.W.L.R. (Part 2) 195 at pp.202-203. The only exception to this general rule is that the party would be allowed to complain on appeal if it can show that it had suffered a miscarriage of justice by reason of the procedural irregularity.
— Uwais, JSC. Saude v. Abdullahi (1989) – SC.197/1987