“… without reasonable and proper cause, conduct itself in a manner calculated and likely to destroy or seriously damage the relationship of confidence and trust between employer and employee.” 16. Two aspects of this implied term are relevant to this case: (1) It is an aspect of this term that the employer will co-operate with the employee’s attempts to carry out the contract and not attempt to frustrate it: United Bank Ltd. v. Akhtar[1989] IRLR 507 , paras 44-46. It is therefore submitted that if the contract provides for a right to a form of payment subject to certain conditions, then it must not seek to frustrate the right to payment either by failing to specify the conditions or making compliance with them by the employee impracticable: PC 6(2) …, RDCC 7(4) … (2) In exercising any discretion that the defendant had as to making any of the relevant payments, it was obliged to exercise it reasonably and rationally: Cantor Fitzgerald International v. Horkulak[2004] EWCA Civ 1287 ,[2005] ICR 402 , paras 22-46; RDCC 7(4). …”