Transnet SOC Limited instituted a self-review to set aside five contracts concluded with IGS Consulting Engineers CC between 2015 and 2016 under its New Multi Product Pipeline Project, alleging non-compliance with s 217 of the Constitution due to corruption and procurement irregularities. Turnmill Proquip Engineering (Pty) Ltd was cited because it had entered into joint venture agreements with IGS in respect of two of the contracts (the second and fourth contracts). The High Court set aside all five contracts, declared them unlawful, and ordered disgorgement of profits, including joint and several liability between IGS and Turnmill in respect of the second contract. On appeal to the Supreme Court of Appeal, IGS withdrew its appeal. Turnmill persisted only because of the joint and several disgorgement order, although Transnet conceded during the appeal that it would abandon joint and several liability. The appeal thus largely concerned mootness and costs.