<p>Transmission network operators, in this case National Grid Electricity Transmission are responsible for delivering network infrastructure necessary to meet consumer needs.</p><p> </p><p>Those operators must assess the environmental impacts of the proposals, including any proposed mitigation designs and any consideration of alternatives. Any mitigation forms part of project proposals examined during the consenting process. The cost of any mitigation is the responsibility of the operator with the regulator potentially having a role depending on the extent of mitigation.. Given the Secretary of State’s role in the consenting process for nationally significant infrastructure, no assessment has been made by the Department.</p>