LETTER 1 filename1.txt Mail Stop 3561 December 20, 2005 By U.S. Mail Mr. Stephen Lucas Group Finance Director National Grid PLC 1-3 Strand London, WC2N 5EH England Re: National Grid PLC Form 20-F for the fiscal year ended March 31, 2005 Filed June 15, 2005 File No. 1-14958 Dear Mr. Lucas: We have completed our review of your Form 20-F and related filings and have no further comments at this time. Sincerely, Jim Allegretto Senior Assistant Chief Accountant