August 8, 2006

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                            SCHEDULE 14A INFORMATION
                                 (Rule 14a-101)

                  Proxy Statement Pursuant to Section 14(a) of
            the Securities and Exchange Act of 1934 (Amendment No. )

Filed by the Registrant  [X]
Filed by a Party other than the Registrant  [ ]

Check the appropriate box:
[ ]     Preliminary Proxy Statement
[ ]     Confidential, For Use of the Commission Only (as permitted by
        Rule 14a-6(e)(2))
[ ]     Definitive Proxy Statement
[ ]     Definitive Additional Materials
[X]     Soliciting Material Pursuant to Section 240.14a-12

                              KeySpan Corporation
                              -------------------
                (Name of Registrant as Specified in Its Charter)

                                     (N/A)
                                     -----
    (Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check the appropriate box):
[X]     No fee required.
[ ]     Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

(1)  Title of each class of securities to which transaction applies:
     N/A______________________________________________________________
(2)  Aggregate number of securities to which transaction applies:
     N/A______________________________________________________________
(3)  Per unit price or other underlying value of transaction  computed  pursuant
     to Exchange  Act Rule 0-11 (set forth the amount on which the filing fee is
     calculated and state how it was determined):
     N/A______________________________________________________________
(4)  Proposed maximum aggregate value of transaction:
     N/A______________________________________________________________
(5)  Total fee paid:
     N/A______________________________________________________________

[ ]  Fee paid previously with preliminary materials.

[ ]  Check box if any part of the fee is offset as provided by Exchange Act Rule
     0-11(a)(2)  and identify the filing for which the  offsetting  fee was paid
     previously.  Identify the previous filing registration statement number, or
     the Form or Schedule and date of its filing.




(1)  Amount Previously Paid:
     N/A______________________________________________________________
(2)  Form, Schedule or Registration Statement No.:
     N/A______________________________________________________________
(3)  Filing Party:
     N/A______________________________________________________________
(4)  Date Filed:
     N/A______________________________________________________________













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Attached is a copy of a press release issued by KeySpan Corporation.

KEYSPAN

                                                                           NEWS
- -------------------------------------------------------------------------------
KeySpan Corporation                                       For Immediate Release

                                                                        Contact:
                                                                 Media Relations
                                                                    516-545-5052
                                                         (516) 824-1241 (beeper)


                 KEYSPAN GETS THE GREEN LIGHT FROM INSTITUTIONAL
                           SHAREHOLDER SERVICES (ISS)

                   FIRM RECOMMENDS A VOTE FOR KEYSPAN'S MERGER
                          AGREEMENT WITH NATIONAL GRID


Brooklyn,  NY (August 8, 2006) - KeySpan Corporation (NYSE: KSE) today announced
Institutional  Shareholder  Services (ISS), the influential  proxy advisory firm
that advises institutional  investors in proxy voting matters, has recommended a
vote FOR KeySpan's merger agreement with National Grid. Management requests that
all  shareholders  act promptly to cast their votes in advance of this important
meeting.

On February  27, 2006,  National  Grid and KeySpan  announced  an agreement  for
National  Grid to acquire  KeySpan,  which would  create the  third-largest  gas
delivery utility in the United States.

The merger, which recently received Hart-Scott Rodino and Exon-Florio approvals,
will be presented for  shareholder  approval at KeySpan's  Annual  Shareholder's
Meeting on August 17.

About KeySpan:
- --------------
A member of the Standard & Poor's 500 Index,  KeySpan Corporation  (NYSE:KSE) is
the fifth  largest  distributor  of  natural  gas in the  United  States and the
largest  in the  Northeast,  operating  regulated  gas  utilities  in New  York,
Massachusetts,  and New  Hampshire  that  serve  2.6  million  customers.  These
customer-focused businesses are complemented by a portfolio of service companies
that  offer  energy-related  products,  services,  and  solutions  to homes  and
businesses.  KeySpan is also the largest  electric  generator in New York State,
with approximately 6,650 megawatts of generating capacity that provides power to
1.1 million  customers of the Long Island Power Authority  (LIPA) on Long Island
and supplies approximately 25 percent of New York City's capacity needs. KeySpan
also operates  LIPA's  transmission  and  distribution  system under contract to
LIPA. In addition to these assets, KeySpan has strategic investments in pipeline
transportation,  distribution, storage, and production. KeySpan has headquarters
in Brooklyn, New England, and Long Island. For more information, visit KeySpan's
web site at www.keyspanenergy.com.


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Additional Information and Where to Find It
- -------------------------------------------

In connection with the proposed merger, the Company has filed a definitive proxy
statement with the Securities and Exchange Commission.  BEFORE MAKING ANY VOTING
OR  INVESTMENT  DECISION,  THE  COMPANY  STOCKHOLDERS  ARE  URGED  TO  READ  THE
DEFINITIVE PROXY STATEMENT BECAUSE IT CONTAINS  IMPORTANT  INFORMATION ABOUT THE
PROPOSED MERGER. The definitive proxy statement is also available free of charge
at  the  Securities  and  Exchange   Commission's  website,   www.sec.gov,   and
stockholders  of the  Company are also able to obtain  additional  copies of the
definitive proxy statement free of charge by directing their requests to KeySpan
Corporation One MetroTech Center, Brooklyn, New York 1120-3850.

The  Company  and its  directors  and  executive  officers  may be  deemed to be
participants in the  solicitation of proxies from its stockholders in connection
with the proposed merger.  Information concerning the interests of the Company's
participants in the  solicitation is set forth in the Company's proxy statements
and Annual  Reports  on Form 10-K,  previously  filed  with the  Securities  and
Exchange  Commission,  and in the  definitive  proxy  statement  relating to the
merger.






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