Lomas v JFB Firth Rixson Inc [2012] EWCA 419 (3 April 2012) is the name of a series of co-joined appeals heard by the English Court of Appeal in relation to the efficacy of certain provisions under the standard form ISDA Master Agreement (1992 form). Four appeals were consolidated into a single hearing, and in a comprehensive joint judgment delivered by Lord Justice Longmore the Court attempted to provide definitive resolutions to various issues of interpretation which had given rise to conflicting judgments at first instance. One academic commentator has referred to the case as a "comprehensive judgment [which] masterfully resolved a number of conflicting strands of jurisprudence".