“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”
“22. The question is therefore whether, objectively, there has been a breach of the implied term. In my view, that objective assessment must be carried out in relation to the implied term read as a whole thus encompassing both elements of that term. Accordingly, the conduct must be such as, objectively, is calculated or likely to undermine the duty of trust and confidence and must be conduct for which there is, objectively, no reasonable and proper cause. Reasonableness, objectively judged, necessarily comes into establishing whether or not there has been a breach of the implied term. But this is not to apply, by the back door as it were, the “range of reasonable responses” test. It is not a question of establishing whether a particular course of action is within the range of reasonable responses to the particular state of affairs and the situation in which the employer finds itself; rather, the question is whether the particular course of action is a reasonable and proper response to that state of affairs and situation in the context of the implied term so as to prevent what would otherwise be a breach of duty from being one.”