Exhibit 99.8




                                                                 EXECUTION COPY


                                LETTER AMENDMENT
              TO AMENDED AND RESTATED MANAGEMENT SERVICES AGREEMENT


                                                              June 29, 2007




     Reference  is  made  to  the  Amended  and  Restated   Management  Services
Agreement,  dated as of January 1, 2006,  between Long Island  Lighting  Company
d/b/a  LIPA  ("LIPA"),  a  wholly-owned  subsidiary  of the  Long  Island  Power
Authority (the  "Authority"),  and KeySpan  Electric  Services LLC as heretofore
amended  (the  "Amended  MSA").  Capitalized  terms used  herein  shall have the
meaning given to them in the Amended MSA unless otherwise defined herein.

     In  June   2007,   KeySpan   Corporation   ("KeySpan")   received  a  Civil
Investigative  Demand  ("CID")  from the  United  States  Department  of Justice
("DOJ").  The CID directs  KeySpan to provide the DOJ with  certain  information
regarding the DOJ's  investigation  into competitive issues in the New York City
electric capacity market.

     In light of the foregoing and the Authority's obligation to insure that its
vendors conduct their business in a responsible manner, the parties hereby agree
as follows:

     1.  Section  7.2(A)(1)  of the Amended MSA is hereby  amended by adding the
following  paragraph  (g)  thereto  as an  additional  Event of  Default  By The
Manager:

     (g) United  States  Department of Justice  Civil  Investigative  Demand No.
24680.  With  respect to the  investigation  referenced  in Civil  Investigative
Demand No. 24680 from the United  States  Department  of Justice  ("DOJ") or any
criminal or grand jury proceeding  related thereto or arising  therefrom (i) the
entry  of a  final,  non-appealable  judgment,  order  or  decree  by a court of
competent  jurisdiction or (ii) the entering into of a final consent decree with
the DOJ, in either case (x) finding or determining  that Guarantor or any of its
affiliates  has violated  Sections 1 or 2 of the Sherman Act and (y) pursuant to
which  Guarantor or any of its  affiliates has been assessed or has agreed to be
assessed  a  monetary  or  criminal  penalty or  sanction  or is the  subject of
injunctive or similar relief.

     2. Section 7.4(A) of the Amended MSA is hereby amended by adding "or clause
(g)" in the fourth line thereof after "clause (f)".

     3. Miscellaneous.

          a.   Except as amended hereby, the Amended MSA shall remain unchanged.

          b.   This Letter  Amendment  shall be governed  by, and  construed  in
               accordance  with,  the Laws of the  State  of New  York  (without
               giving effect to conflict of law principles)  including,  without
               limitation, as to validity, interpretation and effect.




          c.   This Letter Amendment may be executed in two or more counterparts
               which together shall constitute a single agreement.

          d.   This Letter  Amendment shall become  effective upon the Effective
               Date of the Amended and Restated  Management  Services Agreement,
               dated as of January 1, 2006.

     IN WITNESS  WHEREOF,  the parties  have caused this Letter  Amendment to be
executed and delivered by their duly authorized  officers or  representatives as
of the date first above written.

                                                KEYSPAN CORPORATION



                                                By: /s/John J. Bishar Jr.
                                                    ---------------------
                                                       John J. Bishar Jr.
                                                       Executive Vice President
                                                       and General Counsel


                                                KEYSPAN ELECTRIC SERVICES LLC



                                                By: /s/John J. Bishar Jr.
                                                    ---------------------
                                                       John J. Bishar Jr.
                                                       Executive Vice President
                                                       and General Counsel





Agreed to and Acknowledged:

NATIONAL GRID USA



By: /s/Lawrence J. Reilly
    ---------------------
       Lawrence J. Reilly
       Executive Vice President,
       General Counsel

                                                LONG ISLAND POWER AUTHORITY



                                                By: /s/Kevin S. Law
                                                    ---------------
                                                       Kevin S. Law
                                                       Chairman


                                                LONG ISLAND LIGHTING COMPANY
                                                d/b/a LIPA



                                                By: /s/Richard M. Kessel
                                                    --------------------
                                                    CEO & President




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