Under section 165A(1) of the Energy Act 2023 (“the 2023 Act”) the Independent System Operator and Planner (“ISOP”) must have regard to those plans or documents designated as strategic plans under section 165A(2) (“designated strategic plans”) when carrying out functions relating to network connections. The Secretary of State by notice designated the National Energy System Operator Limited as the ISOP with effect from 1st October 2024.