The appellants notified the Competition Commission of two large mergers: the Anglovaal merger and the Kumba merger. The Commission investigated under section 12A of the Competition Act 89 of 1998 and recommended unconditional approval. The Industrial Development Corporation of South Africa (IDC) applied to the Competition Tribunal for leave to participate in the merger proceedings. The Tribunal granted the IDC leave to participate, determined the scope of its participation, and allowed access to confidential documents. Earlier Tribunal decisions were set aside by the Competition Appeal Court because they were taken by a single member rather than a full panel. A full Tribunal panel reconsidered the matter and again granted the IDC leave to participate. The appellants appealed, challenging the Tribunal’s decision to allow amendment of the IDC’s application, the finding of ‘good cause’ for participation, and the IDC’s access to confidential information.