EX-15 12 d360489dex15.htm CONSENT OF PRICEWATERHOUSECOOPERS LLP Consent of PricewaterhouseCoopers LLP

EXHIBIT 15

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 333-33094, 333-65968, 333-97249, 333-103768, 333-107727, 333-149828, 333-155527, 333-170716 and 333-175852) and form F-3 (No. 333-160013) of National Grid plc of our report dated May 16, 2012 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 20-F.

/s/ PricewaterhouseCoopers LLP                

PricewaterhouseCoopers LLP

London, UK

June 12, 2012