There may be cases where the body employing the servant is under some statutory or other restrictions as to the kind of contract or the grounds on which it can remove or dismiss him. In such contracts, if the servant is removed on grounds other than those specified in the contract or allowed by Statute, his removal will be held to be unjustified or ultra vires, null and void as the case may be:- see McChelland v. Northern Ireland General Health Service Board (1957) 1 W.L.R. 549.
— A. Oputa, JSC. Olaniyan & Ors. v. University of Lagos (1985) – SC.53/1985