9 The main cause of Metronet's failure was its poor corporate governance and leadership. Many decisions had to be agreed unanimously by five shareholders, which all acted as Metronet's suppliers and had different motivations depending on their roles. The executive management changed frequently and was unable to manage the work of its shareholder-dominated supply chain effectively. These suppliers had power over some of the scope of work, expected to be paid for extra work undertaken and had better access to cost information than the management. The poor quality of information available to management, particularly on the unit costs of the station and track programmes, meant that Metronet was unable to monitor costs and could not obtain adequate evidence to support claims to have performed work economically and efficiently.