something of a false one in that contract law sets out to provide a framework within which rules appropriate to the varying circumstances and specific needs of nominate contracts can develop. It may be claimed that notions of pluralism underpin the general principles of contract law. Over the last thirty or so years the changes to the content of the employment contract that have occurred have been very significant and some of the more recently created implied terms in law can be viewed, perfectly correctly, as evidence of a profound change in the judicial view of the employment relationship. 2 What is not always appreciated is the extent to which changes in the general contractual framework have facilitated this. Up until the decision of the House of Lords in Liverpool CC v Irwin it could have been said with a strong measure of justification that the test for implication was `necessity' even where default rules were concerned. 3 Of late it has been accepted by the judiciary that the "necessity" involved in implying terms such as mutual trust and confidence is "somewhat protean". 4 Fortunately, there is now acceptance that `to some extent at least, the existence and scope of standardised implied terms raise questions of reasonableness, fairness and the balancing of competing policy considerations." 5 Irwin concerned the landlord and tenant relationship and cogently demonstrates the impact that such an approach can have when judicial deliberations take account of social policy. 6 There the House of Lords implied a term that the landlord was required to take reasonable care of the common parts of the property, such as lifts, stairwells and rubbish chutes. As Atiyah has pointed out such an outcome could hardly be said to be based on a test of necessity. 7 By way of contrast it is striking to note that in Australia a successful attempt was made in Commonwealth Bank v Barker to deny the existence of the implied obligation of mutual trust and confidence on the basis that it is not necessary to the functioning of the employment relationship. 8 The High Court applying the test set out in Byrne v Australian Airlines that absent the implication, "the enjoyment of the rights conferred by the contract would or could be rendered nugatory, worthless, or, perhaps, be seriously undermined" or the contract would be "deprived of its substance, seriously undermined or drastically devalued". 9 Such a rigorous test for implication is favoured as a means of excluding consideration of the policy concerns that have 2 In Johnson v Unisys [2003] 1 AC 518 Lord Hoffmann observed that `over the last 30 years or so, the nature of the contract of employment has been transformed…The contribution of the common law to the employment revolution has been by the evolution of implied terms in the contract of employment. The most far reaching is the implied term of trust and confidence. But there have been others.'