Exhibit 23.1
Consent of Independent Registered Public Accounting Firm
We hereby consent to the incorporation by reference in this Registration Statement on Form F-3 of National Grid of our report dated May 17, 2006 relating to the consolidated financial statements, which appears in National Grid plc’s Annual Report on Form 20-F for the year ended March 31, 2006. We also consent to the reference to us under the heading “Experts” in such Registration Statement.
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| /s/ PricewaterhouseCoopers LLP | |
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| PricewaterhouseCoopers LLP | |
| London, U.K. | |
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| June 27, 2006 | |
