<ARTICLE> UT
<LEGEND>
This schedule contains summary financial information extracted from Southern
Investments UK plc Form 10-K for the twelve months ended March 31, 2000, and is
qualified in its entirety by reference to such financial statements. Values are
in (pound) sterling.
</LEGEND>
<MULTIPLIER> 1,000,000
<CURRENCY> Pounds Sterling



                        
<PERIOD-TYPE>                                      12-MOS
<FISCAL-YEAR-END>                                  MAR-31-2000
<PERIOD-START>                                     APR-1-1999
<PERIOD-END>                                       MAR-31-2000
<EXCHANGE-RATE>                                    1.5922
<BOOK-VALUE>                                       PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                          1,250
<OTHER-PROPERTY-AND-INVEST>                        15
<TOTAL-CURRENT-ASSETS>                             87
<TOTAL-DEFERRED-CHARGES>                           0
<OTHER-ASSETS>                                     705
<TOTAL-ASSETS>                                     2,057
<COMMON>                                           0
<CAPITAL-SURPLUS-PAID-IN>                          902
<RETAINED-EARNINGS>                               (123)
<TOTAL-COMMON-STOCKHOLDERS-EQ>                     779
<PREFERRED-MANDATORY>                              50
<PREFERRED>                                        0
<LONG-TERM-DEBT-NET>                               301
<SHORT-TERM-NOTES>                                 342
<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>                     585
<TOT-CAPITALIZATION-AND-LIAB>                      2,057
<GROSS-OPERATING-REVENUE>                          275
<OTHER-OPERATING-EXPENSES>                         143
<TOTAL-OPERATING-EXPENSES>                         143
<OPERATING-INCOME-LOSS>                            132
<OTHER-INCOME-NET>                                 209
<INCOME-TAX-EXPENSE>                               74
<INCOME-BEFORE-INTEREST-EXPEN>                     267
<TOTAL-INTEREST-EXPENSE>                           56
<NET-INCOME>                                       211
<PREFERRED-STOCK-DIVIDENDS>                        0
<EARNINGS-AVAILABLE-FOR-COMM>                      0
<COMMON-STOCK-DIVIDENDS>                           188
<TOTAL-INTEREST-ON-BONDS>                          0
<CASH-FLOW-OPERATIONS>                             124
<EPS-BASIC>                                        0
<EPS-DILUTED>                                      0