Exhibit 99


  
 FOR RELEASE: DEC. 14, 1998    
  
  
 CONTACTS:   
  
      NEES                                    NATIONAL GRID 
  
      INVESTORS:                              INVESTORS: 
      Bob Seega, 508-389-2178                 Jill Sherrett 
                                              011-44-171-620-9191 
      MEDIA:                         
      Until 6:00 a.m.:                        MEDIA: 
      Susan Stevens, 617-236-5800 x2811       Margaret Stewart 
                                              011-44-171-620-9191 
      After 6:00 a.m.: 
      Amy Tull, 508-389-3283 
  
   
        NEES AND NATIONAL GRID TO MERGE IN $3.2 BILLION TRANSACTION 
  
      WESTBOROUGH, Mass., Dec. 14, 1998   The National Grid Group plc
 (LSE:NGG) and New England Electric System (NYSE:NES) announced today that
 they have signed a merger agreement under which National Grid will acquire
 all of the outstanding shares of NEES.  Under the terms of the agreement,
 NEES shareholders will receive $53.75 in cash (subject to upward
 adjustment) for each NEES share held.  The terms value the equity of NEES
 at approximately $3.2 billion and represent a premium of 25% above the
 closing price of NEES shares on Dec. 11, 1998. 
 
     National Grid is the owner and operator of the England and Wales high-
 voltage transmission network, including interconnectors with Scotland and
 France.  National Grid is the world's largest privately owned transmission
 company, and has almost a decade of experience running a transmission
 network in a competitive market.  It is listed on the London Stock Exchange
 with a market capitalization of $12.4 billion.   

      NEES will become the base of U.S. operations for National Grid, and
 will provide a regional platform for growth in transmission and
 distribution

      "For NEES and our employees, this transaction not only keeps jobs in
 New England, it represents a tremendous opportunity for growth as the base
 of U.S. operations for a large and successful company.  For our customers
 and the region, it is an opportunity to benefit from National Grid's proven
 track record of delivering high-quality, low-cost transmission service in
 the competitive UK market. National Grid's considerable experience should
 benefit customers here as the competitive electricity market develops in
 the northeast," said Rick Sergel, president and chief executive officer o
 NEES. 

      "Most important, our customers will continue to receive the same great
 service from the same people in the yellow trucks, 24 hours a day; and they
 will continue to receive rates among the lowest in the region.  The only
 difference is that we will have the resources of an international leader
 behind us," Sergel said. 

      Commenting on the acquisition, David Jones, chief executive of
 National Grid, said: "NEES has a strong reputation for efficient service to
 customers, and has already played a prominent role in the regulatory
 developments in the region.  The chemistry between the management teams is
 excellent, and by combining our expertise with that of NEES, I am confident
 that as a group we will be able to deliver on the exciting prospects in the
 northeast U.S. and continue to enhance value for National Grid
 shareholders." 

      According to National Grid, the acquisition: 

 o    represents a significant investment in an efficient, focused
      transmission and distribution business with a strong operational track
      record, which will benefit further from National Grid's core skills;
  
 o    enhances National Grid's earnings per share before the amortization of
      goodwill and significantly enhances National Grid's cash flow per
      share immediately following the acquisition;

 o    provides the right point of entry into the U.S. for National Grid,
      given New England's favorable economic climate and its advanced state
      of regulatory evolution toward performance-based regulation;
 
 o    brings National Grid a high-quality management team with proven
      distribution expertise and a shared view of the industry's future
      development in the northeast U.S.; an

 o    provides an excellent regional platform for growth in transmission and
      distribution.
 
      Rick Sergel will continue as president and chief executive officer of
 NEES and will join the National Grid Board as an executive director,
 together with one of NEES's outside directors.  Alfred D. Houston, NEES
 chairman, will step down upon the closing of the merger, and will serve as
 a consultant for two years.  A NEES advisory board will be established for
 two years.  

      Upon completion of the acquisition, NEES will become a wholly owned
 subsidiary of National Grid.  NEES and its subsidiary names will remain the
 same.   Headquarters for U.S. operations will remain in Massachusetts, and
 the strong links forged by NEES with its local communities in
 Massachusetts, Rhode Island and New Hampshire will be maintained, according
 to National Grid. 

      The acquisition is subject to a number of regulatory and other
 approvals and consents, including approvals by the U.S. Securities and
 Exchange Commission, Federal Energy Regulatory Commission, and Nuclear
 Regulatory Commission, support from the states in which NEES operates, and
 Hart-Scott-Rodino approval. The acquisition also requires approval by
 shareholders of both companies, and is expected to be completed by early
 2000.  

      NEES shareholders will receive a cash payment of $53.75 for each share
 held when the merger is completed.  The cash payment will be subject to an
 increase if the completion of the merger does not take place on or before
 the date following six months after approval of the merger by NEES
 shareholders.  The amount of any such adjustment will be determined using a
 daily accrual rate of $0.0033 until closing, up to a maximum increase of
 $0.60 per share. 

      Merrill Lynch & Co. served as financial advisor and delivered a
 fairness opinion to NEES.  Rothschild and Dresdner Kleinwort Benson are
 jointly advising National Grid.  Dresdner Kleinwort Benson Securities and
 HSBC Securities are brokers to National Grid. 

      More information on the merger agreement and both companies is
 available on the NEES web site at www.nees.com, and the National Grid web
 site at www.ngc.co.uk.  

      NEES is a public utility holding company headquartered in Westborough
 Mass. Its subsidiaries Massachusetts Electric Company, Narragansett
 Electric Company, Granite State Electric Company, and Nantucket Electric
 Company serve approximately 1.3 million customers in Massachusetts, Rhode
 Island and New Hampshire. Unregulated subsidiaries include AllEnergy, an
 energy marketing company, and NEESCom, a telecommunications company.
 
 This document contains statements that may be considered forward looking
 under the securities laws.  Actual results may differ materially.  For a
 list of factors that could influence results, please refer to NEES's Form
 10-Q for the period ended Sept. 30, 1998.  The transaction is also subject
 to contingencies as discussed herein.