WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.

 


<ARTICLE>     UT
<LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE UNAUDITED BALANCE SHEET AND RELATED STATEMENTS OF INCOME AND RETAINED
EARNINGS OF NATIONAL GRID USA SERVICE COMPANY, INC., AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
<MULTIPLIER> 1,000

               
<FISCAL-YEAR-END>     MAR-31-2000
<PERIOD-END>     MAR-31-2000
<PERIOD-TYPE>     12-MOS
<BOOK-VALUE>     PER-BOOK
<TOTAL-NET-UTILITY-PLANT>     0
<OTHER-PROPERTY-AND-INVEST>     83,420
<TOTAL-CURRENT-ASSETS>     36,460
<TOTAL-DEFERRED-CHARGES>     102,800     
<OTHER-ASSETS>     0
<TOTAL-ASSETS>     222,680
<COMMON>          25,525
<CAPITAL-SURPLUS-PAID-IN>     0
<RETAINED-EARNINGS>     50
<TOTAL-COMMON-STOCKHOLDERS-EQ>     25,575
<PREFERRED-MANDATORY>     0
<PREFERRED>     0
<LONG-TERM-DEBT-NET>     0
<SHORT-TERM-NOTES>     0
<LONG-TERM-NOTES-PAYABLE>     0
<COMMERCIAL-PAPER-OBLIGATIONS>     0
<LONG-TERM-DEBT-CURRENT-PORT>     0
<PREFERRED-STOCK-CURRENT>     0
<CAPITAL-LEASE-OBLIGATIONS>     0
<LEASES-CURRENT>     0
<OTHER-ITEMS-CAPITAL-AND-LIAB>     197,105
<TOT-CAPITALIZATION-AND-LIAB>     222,680
<GROSS-OPERATING-REVENUE>     0
<INCOME-TAX-EXPENSE>     445
<OTHER-OPERATING-EXPENSES>     204,516
<TOTAL-OPERATING-EXPENSES>     204,961
<OPERATING-INCOME-LOSS>     (204,961)
<OTHER-INCOME-NET>     208,198
<INCOME-BEFORE-INTEREST-EXPEN>     3,237
<TOTAL-INTEREST-EXPENSE>     1,398
<NET-INCOME>     1,839
<PREFERRED-STOCK-DIVIDENDS>     0
<EARNINGS-AVAILABLE-FOR-COMM>     1,839
<COMMON-STOCK-DIVIDENDS>     1,839
<TOTAL-INTEREST-ON-BONDS>     0
<CASH-FLOW-OPERATIONS>     N/A
<EPS-BASIC>     0
<EPS-DILUTED>     0

<F1> Total deferred charges includes other assets.