Mackellar Mining Equipment Pty Ltd and Dramatic Investments Pty Ltd t/as Partnership 818 & Anor v Thornton & Ors

The High Court of Australia heard an appeal concerning a dispute between Mackellar Mining Equipment Pty Ltd and Dramatic Investments Pty Ltd (trading as Partnership 818) and the respondents, Thornton and others. The core of the dispute involved the interpretation and application of a deed of settlement and release, specifically concerning the extent to which it released the appellants from certain claims.

The central legal issue before the High Court was whether the deed of settlement and release, properly construed, operated to release the appellants from claims brought by the respondents relating to alleged breaches of contract and misleading and deceptive conduct that occurred prior to the execution of the deed. The court was required to determine the scope of the release and whether the language used in the deed was sufficiently clear and unambiguous to encompass the specific claims being pursued by the respondents.

The High Court, in its joint judgment, reasoned that the construction of a deed of settlement and release is a matter of contractual interpretation, requiring an objective assessment of the language used by the parties in the context of the surrounding circumstances. The Court emphasised that a general release clause will not be construed to cover claims of which the parties were unaware or which were not within their contemplation at the time of entering into the deed, unless the language is exceptionally clear and specific. Applying this principle, the Court found that the wording of the deed did not extend to releasing the appellants from the specific claims of breach of contract and misleading and deceptive conduct that the respondents sought to pursue. The Court concluded that the respondents were not precluded by the deed from bringing these claims.