In autumn 2022, the business cases of three clusters (‘Synergy’, ‘Matrix’ and ‘Unity’) identified potential benefits (both “cashable” and “non-cashable”) of £2 billion at an estimated cost of £0.9 billion.29 However, the three clusters have not calculated these figures on a consistent basis. For example, clusters have different definitions for what constitutes “cashable” savings and have calculated them over different timescales.30 In addition, the ‘Defence’ cluster has yet to provide any information to the Cabinet Office on the benefits of its shared services plans and the ‘Overseas’ cluster has only recently provided a benefits figure of £6 million a year.31