EXHIBIT 21.1
Southern Investments UK plc - subsidiaries
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SIUK plc Subsidiary % owned Status
South Western Electricity plc 100 Operating
Aztec Insurance Limited 100 Operating
EA Technology Limited 7.7 Operating
ElectraLink Limited 6.19 Operating
Electricity Association Limited 5.9 Operating
Electricity Pensions Limited 0 Operating
Electricity Pensions Trustee Limited 5 Operating
ESN Holdings Limited 4.5 Operating
Non-Fossil Purchasing Agency Limited 8.3 Operating
Northmere Limited 0 Operating
REC Collect Limited 25 Operating
South West Enterprise Limited 0 Operating
South Western Electricity Share Scheme Trustees Limited 100 Dormant
South Western Energy Limited 100 Dormant
South Western Helicopters Limited 100 Operating
South Western Natural Gas Limited 100 Dormant
South Western Power Limited 100 Operating
Green Electron Limited 90 Operating
South Western Power Investments Limited 100 Operating
Teesside Power Limited 7.7 Operating
Wind Resources Limited 45 Operating
Carland Cross Limited 100 Operating
Coal Clough Limited 100 Operating
Winterton Power Limited 25 Operating
St Clements Services Limited 9.1 Operating
SWEB Data Collection Services Limited 100 Operating
SWEB Energy Purchasing Limited 100 Operating
SWEB Finance Limited 100 Dormant
SWEB Gas Limited 100 Dormant
SWEB Insurance Limited 100 Operating
SWEB Investments 1996 Limited 100 Operating
Croeso Systems Development Limited 50 Operating
EBusiness South West Limited 45 Operating
SWEB Limited 100 Dormant
SWEB Natural Gas Limited 100 Dormant
SWEB Meter Operator Services Limited 100 Dormant
SWEB Pension Trustee Limited 100 Dormant
SWEB Property Developments Limited 100 Operating
Temple Back Developments Limited 49 Operating
Weston-Super-Mare Developments Limited 100 Operating
SWEB Property Investments Limited 100 Operating
SWEB Retail Limited 100 Dormant
SWEB Telecom Limited 100 Dormant
UK Data Collection Services Limited 8.3 Operating
Western Natural Gas Limited 100 Dormant