Where an officer holds his office “at pleasure,” like was the case in Brown v. Dagenham Urban District Council (1929) 1 K.B. 737 at p.742 he can be dismissed at will in complete disregard of any purported contract whether verbal, or written or even under seal, because such contract will be incompatible with his status and therefore destitute of legal value. Thus Servants of the Crown, civil as well as military, except in special cases, where it is otherwise provided by law, hold their office only during the pleasure of the Crown and can be dismissed at any time in spite of a contract for a period of Service:- Dunn v. Reginam (1896)1 Q.B. 116. In fact the employing authority will lack the power, the vires to “enter into a contract” inconsistent with the wording of the Statute which gave it power in the public interest to remove the Servant at its pleasure:- Nicholson v. Whitstable Urban District Council (1925) 89 J. P. Newsp 480 at p.508. An officer holding his office at pleasure has also no right to be heard before he is removed because there need not be anything against him to warrant his removal. If there is nothing against him, no reason need be given for there is nothing to defend since he held his office durante bene placito: See Reg v. Dartington School Governors (1844) 6 Q.B.682.
— A. Oputa, JSC. Olaniyan & Ors. v. University of Lagos (1985) – SC.53/1985