This document contains certain statements that are neither reported financial results nor other historical information. These statements are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Because these forward-looking statements are subject to assumptions, risks and uncertainties, actual future results may differ materially from those expressed in or implied by such statements. Many of these assumptions, risks and uncertainties relate to factors that are beyond our ability to control or estimate precisely, such as delays in obtaining or adverse conditions contained in regulatory approvals, competition and industry restructuring, changes in economic conditions, currency fluctuations, changes in interest and tax rates, changes in energy market prices, changes in historical weather patterns, changes in laws, regulations or regulatory policies, developments in legal or public policy doctrines, the impact of changes to accounting standards, technological developments, the failure to retain key management, the availability of new acquisition opportunities or the timing and success of future acquisition opportunities. Other factors that could cause actual results to differ materially from those described in this document include the ability to continue to integrate the US and UK businesses acquired by or merged with the Group, the failure to achieve reductions in costs or to achieve operational efficiencies, unseasonable weather impacting on demand for electricity and gas, the behaviour of UK electricity market participants on system balancing, the timing of amendments in prices to shippers in the UK gas market, the performance of our pension schemes and the regulatory treatment of pension costs, the impact of the separation and the planned disposals of four of our UK Gas Distribution networks and any adverse consequences arising from outages on or otherwise affecting energy networks which we own and/or operate. For a more detailed description of these assumptions, risks and uncertainties, together with any other risk factors, please see our filings with the US Securities and Exchange Commission (and in particular the Risk Factors section of this document). Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this document. National Grid Transco does not undertake any obligation to release publicly any revisions to these forward-looking statements to reflect events or circumstances after the date of this document.

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