NISTA and the Teal Book—A new era for UK infrastructure delivery
Construction analysis: The National Infrastructure Commission (NIC) and Infrastructure and Projects Authority (IPA) were merged into a single body, the National Infrastructure and Service Authority (NISTA) , on 1 April 2025. On the same date, the government published the ‘Teal Book’, described as a guide for successful project delivery in government. These developments represent a fundamental shift in the government’s approach to infrastructure planning and delivery. In this analysis, Theresa Mohammed and, Partner, and Dom Turner-Harriss, Associate, at Watson Farley & Williams LLP, consider the detail and potential impact of these developments.