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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The  following  joint press release  issued by the Long Island Power  Authority,
KeySpan Corporation ("KeySpan") and National Grid plc ("National Grid") on March
1, 2006 was being posted on  KeySpan's  internal  website  beginning on March 2,
2006.


- ------------------------------- -------------------------- ---------------------
           LIPA                      nationalgrid               KEYSPAN
Long Island Power Authority
- ------------------------------- -------------------------- ---------------------
Contact:                        Contact:                   Contact:
LIPA Media Pager:               Jackie Barry               KeySpan Media Pager:
516-525-LIPA (5472)             Manager, Media Relations   516-824-1241
                                National Grid
                                508-389-6776
- ------------------------------- -------------------------- ---------------------



March 1, 2006

Joint Statement by
Richard M. Kessel, Chairman, LIPA
Robert B. Catell, Chairman/CEO, KeySpan
Steve Holliday, Group Chief Executive Designate, National Grid plc
Mike Jesanis, President, National Grid USA


As a result of today's initial meeting,  it has been agreed that a team composed
of representatives of the Long Island Power Authority, KeySpan and National Grid
will work cooperatively to address issues of importance to the Authority related
to National Grid's acquisition of KeySpan, the manager, under long-term contact,
of LIPA's transmission and distribution system.

Additionally,  the team will focus on an assessment of the potential benefits to
LIPA's electric customers of National Grid's acquisition of KeySpan.

These are key issues of significant importance to LIPA, and KeySpan and National
Grid  have  agreed  to work  cooperatively  in  addressing  them as  quickly  as
possible.




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

KeySpan intends to file with the Securities and Exchange  Commission (the "SEC")
a proxy  statement and other relevant  documents in connection with the proposed
acquisition  of KeySpan by National  Grid.  Investors  and  security  holders of
KeySpan are advised to read the proxy  statement  and other  relevant  documents
when they become available, as they will contain important information about the
transaction.  Investors and security holders may obtain a free copy of the proxy
statement  and other  documents  filed by KeySpan with the SEC, when they become
available, at the SEC's web site at http:/www.sec.gov.

KeySpan  and  its  directors,  executive  officers  and  other  members  of  its
management and employees may be deemed to be participants in the solicitation of
proxies from its security  holders in connection with the proposed  acquisition.
Information   concerning  the  interests  of  KeySpan's   participants   in  the
solicitation  is set forth in KeySpan's  most recent proxy  statement and Annual
Report on Form 10-K (filed with the SEC on March 30, 2005 and February 28, 2006,
respectively)  and will be set  forth in the  proxy  statement  relating  to the
acquisition when it becomes available.



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