National Grid LNG, L.P. Semi-Annual Storage Report for the period April 1, 2011 through October 31, 2011.

CD CULLENandDYKMANLLP 110114th Street,N.W. NAME:KENNETHT.MALONEY Suite550 Title:Partner Washington,D.C.200055600 kmaloney@cullenanddykman.com Telephone:2022238890Fax:2024571405 November 28, 2011 Kimberly Bose, Secretary Federal Energy Regulatory Commission 888 First Street, N.E. Room 1A Washington, D.C. 20426 Re: National Grid LNG, L.P. Semi-Annual Storage Reports 18 C.F.R. 284.13(e) Dear Secretary Bose: Enclosed for electronic filing on behalf of National Grid LNG, L.P. is the Semi-Annual Storage Report for the period April 1, 2011 through October 31, 2011, together with a signed affidavit from a senior officer verifying the report. Please contact the undersigned if you have any questions. Yours truly, /s/Kenneth T. Maloney Kenneth T. Maloney Counsel For National Grid LNG, L.P. National Grid LNG, L.P. Summary of Storage Injection and Withdrawal Activities For the Period - 4/1/2011 through 10/31/2011 Maximum Maximum Daily Actual Reservation Displacement Total Storage Quantity Withdrawal Quantity Quantities Actual Quantities Charge Charge Revenues Discounts (1) Customer Affiliate (Y/N) Rate Schedule (Dth) (Dth) Injected (Dth) Withdrawn (Dth) ($/Dth/mo.) ($/Dth/mo) Received ($/Dth/mo) April CONSOLIDATED EDISON COMPANY OF NEW YORK,INC N FST-LG 500,000 20,000 - 10,000 $ 0.2729 $ 0.0417 $ 157,300 None BOSTON GAS COMPANY D/B/A NATIONAL GRID Y FST-LG 1,159,664 35,000 - - $ 0.2729 $ 0.0417 $ 364,830 None THE NARRAGANSETT ELECTRIC COMPANY D/B/A NATIONAL GRID Y FST-LG 600,000 95,000 - 34 $ 0.2729 $ - $ 163,740 None Total - April 2,259,664 150,000 - 10,034 $ 685,870 May CONSOLIDATED EDISON COMPANY OF NEW YORK,INC N FST-LG 500,000 20,000 - - $ 0.2729 $ 0.0417 $ 157,300 None BOSTON GAS COMPANY D/B/A NATIONAL GRID Y FST-LG 1,159,664 35,000 95,062 - $ 0.2729 $ 0.0417 $ 364,830 None THE NARRAGANSETT ELECTRIC COMPANY D/B/A NATIONAL GRID Y FST-LG 600,000 95,000 161,957 - $ 0.2729 $ - $ 163,740 None Total - May 2,259,664 150,000 257,019 - $ 685,870 June CONSOLIDATED EDISON COMPANY OF NEW YORK,INC N FST-LG 500,000 20,000 13,888 - $ 0.2729 $ 0.0417 $ 157,300 None BOSTON GAS COMPANY D/B/A NATIONAL GRID Y FST-LG 1,159,664 35,000 274,030 - $ 0.2729 $ 0.0417 $ 364,830 None THE NARRAGANSETT ELECTRIC COMPANY D/B/A NATIONAL GRID Y FST-LG 600,000 95,000 - - $ 0.2729 $ - $ 163,740 None Total - June 2,259,664 150,000 287,918 - $ 685,870 July CONSOLIDATED EDISON COMPANY OF NEW YORK,INC N FST-LG 500,000 20,000 114,805 - $ 0.2729 $ 0.0417 $ 157,300 None BOSTON GAS COMPANY D/B/A NATIONAL GRID Y FST-LG 1,159,664 35,000 291,284 - $ 0.2729 $ 0.0417 $ 364,830 None THE NARRAGANSETT ELECTRIC COMPANY D/B/A NATIONAL GRID Y FST-LG 600,000 95,000 - - $ 0.2729 $ - $ 163,740 None Total - July 2,259,664 150,000 406,089 - $ 685,870 August CONSOLIDATED EDISON COMPANY OF NEW YORK,INC N FST-LG 500,000 20,000 149,556 - $ 0.2729 $ 0.0417 $ 157,300 None BOSTON GAS COMPANY D/B/A NATIONAL GRID Y FST-LG 1,159,664 35,000 59,003 - $ 0.2729 $ 0.0417 $ 364,830 None THE NARRAGANSETT ELECTRIC COMPANY D/B/A NATIONAL GRID Y FST