To ask the Secretary of State for Energy Security and Net Zero, what assessment her Department has made of the effectiveness of Ofgem's role in enforcing the use of the Treasury Green Book guidance in relation to the development of the Norwich to Tilbury proposals by the National Grid.

To ask the Secretary of State for Energy Security and Net Zero, if she will have discussions with National Grid on ensuring that energy infrastructure projects comply with HM Treasury's publication entitled The Green Book, published in March 2022.

The Green Book provides standard guidance for evaluating benefits and outcomes of projects. Transmission Owners follow a robust assessment process and use national guidance, primarily the National Policy Statement for Electricity Networks Infrastructure. Their proposals are subject to an independent high-level assessment of their ability to meet electricity network needs by the Electricity System Operator. Ofgem expects Transmission Owners to reference the Green Book in their submissions, but its application is not enforced and there is no requirement in the Planning Act 2008 for a Green Book assessment to be included in Development Consent Order applications.