We take it as inherent. that there may well be conduct which is either calculated or likely to destroy or seriously damage the relationship of confidence and trust between employer and employee, which a literal interpretation of the written words of the contract might appear to justify and it is in this sense that we consider that in the field of employment law it is proper to imply an overriding obligation [of trust and respect]. which is independent of, and in addition to, the literal interpretation of the actions which are permitted to the employer under the terms of the contract.
Mr Justice Knox, United Bank v Akhtar [1989] IRLR 507, 512
With reference to the above judgment, and other relevant legal authority, critically evaluate the development and application of the implied duty of mutual trust and respect (or confidence).