<ARTICLE> UT
<LEGEND>
This schedule contains summary financial information extracted from Southern
Investments UK plc Form 10-Q for the three months ended June 30, 1998, and is
qualified in its entirety by reference to such financial statements.  Values
are in (pound) sterling.
</LEGEND>
<MULTIPLIER> 1,000,000
<CURRENCY> British Pounds Sterling
       
                                                   
<PERIOD-TYPE>                                                3-MOS
<FISCAL-YEAR-END>                                      MAR-31-1999
<PERIOD-START>                                         APR-1-1998
<PERIOD-END>                                           JUN-30-1998
<EXCHANGE-RATE>                                             1.6695
<BOOK-VALUE>                                              PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                                1,266
<OTHER-PROPERTY-AND-INVEST>                                320
<TOTAL-CURRENT-ASSETS>                                     133
<TOTAL-DEFERRED-CHARGES>                                     0
<OTHER-ASSETS>                                               0
<TOTAL-ASSETS>                                           1,719
<COMMON>                                                     0
<CAPITAL-SURPLUS-PAID-IN>                                  500
<RETAINED-EARNINGS>                                       (167)
<TOTAL-COMMON-STOCKHOLDERS-EQ>                             333
<PREFERRED-MANDATORY>                                       50
<PREFERRED>                                                  0
<LONG-TERM-DEBT-NET>                                       301
<SHORT-TERM-NOTES>                                         260
<LONG-TERM-NOTES-PAYABLE>                                    0
<COMMERCIAL-PAPER-OBLIGATIONS>                              80
<LONG-TERM-DEBT-CURRENT-PORT>                                0
<PREFERRED-STOCK-CURRENT>                                    0
<CAPITAL-LEASE-OBLIGATIONS>                                  0
<LEASES-CURRENT>                                             0
<OTHER-ITEMS-CAPITAL-AND-LIAB>                             695
<TOT-CAPITALIZATION-AND-LIAB>                            1,719
<GROSS-OPERATING-REVENUE>                                  181
<OTHER-OPERATING-EXPENSES>                                 150
<TOTAL-OPERATING-EXPENSES>                                 150
<OPERATING-INCOME-LOSS>                                     31
<OTHER-INCOME-NET>                                           8
<INCOME-TAX-EXPENSE>                                         8
<INCOME-BEFORE-INTEREST-EXPEN>                              31
<TOTAL-INTEREST-EXPENSE>                                    15
<NET-INCOME>                                                16
<PREFERRED-STOCK-DIVIDENDS>                                  0
<EARNINGS-AVAILABLE-FOR-COMM>                                0
<COMMON-STOCK-DIVIDENDS>                                    20
<TOTAL-INTEREST-ON-BONDS>                                    0
<CASH-FLOW-OPERATIONS>                                      47
<EPS-PRIMARY>                                                0
<EPS-DILUTED>                                                0