HM Treasury has issued DAO 08/25 requiring accounting officers to obtain explicit Treasury consent before undertaking spending proposals involving private finance models for infrastructure or capital assets where the public sector is involved. The guidance follows the Balance Sheet Framework published in November 2025 and the updated Green Book issued in February 2026. It also requires robust monitoring and evaluation, expanded reporting through the Infrastructure Pipeline, and records of completed contracts signed since 2010. The changes respond to July 2025 recommendations from the Public Accounts Committee, including calls for a specific approach to infrastructure risks and a central database of private finance projects.