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PricewaterhouseCoopers LLP, 300 Madison Avenue, New York, NY 10017
T: (646) 471 3000, F: (646) 471 8320, www.pwc.com/us
Independent Auditor's Report
To the Shareholder and Board of Directors of National Grid North America Inc. and Subsidiaries:
We have audited the accompanying consolidated financial statements of National Grid North America Inc.
and Subsidiaries (the “Company”), which comprise the consolidated balance sheets as of March 31, 2013
and March 31, 2012, and the related consolidated statements of income, comprehensive income, cash
flows, capitalization and shareholder’s equity for the years then ended.
Management's Responsibility for the Consolidated Financial Statements
Management is responsible for the preparation and fair presentation of the consolidated financial
statements in accordance with accounting principles generally accepted in the United States of America;
this includes the design, implementation, and maintenance of internal control relevant to the preparation
and fair presentation of financial statements that are free from material misstatement, whether due to
fraud or error.
Auditor's Responsibility
Our responsibility is to express an opinion on the consolidated financial statements based on our audits.
We conducted our audits in accordance with auditing standards generally accepted in the United States of
America. Those standards require that we plan and perform the audit to obtain reasonable assurance
about whether the consolidated financial statements are free from material misstatement.
An audit involves performing procedures to obtain audit evidence about the amounts and disclosures in
the consolidated financial statements. The procedures selected depend on our judgment, including the
assessment of the risks of material misstatement of the consolidated financial statements, whether due to
fraud or error. In making those risk assessments, we consider internal control relevant to the Company's
preparation and fair presentation of the consolidated financial statements in order to design audit
procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on
the effectiveness of the Company's internal control. Accordingly, we express no such opinion. An audit
also includes evaluating the appropriateness of accounting policies used and the reasonableness of
significant accounting estimates made by management, as well as evaluating the overall presentation of
the consolidated financial statements. We believe that the audit evidence we have obtained is sufficient
and appropriate to provide a basis for our audit opinion.
Opinion
In our opinion, the consolidated financial statements referred to above present fairly, in all material
respects, the financial position of National Grid North America Inc. and Subsidiaries at March 31, 2013
and March 31, 2012, and the results of its operations and its cash flows for the years then ended in
accordance with accounting principles generally accepted in the United States of America.
October 30, 2013