1 Exhibit 12.1 CALCULATION OF EARNINGS TO FIXED CHARGES RATIO SUCCESSOR COMPANY EXCLUDING THE RESULTS OF THE GENERATION BUSINESS Nine Month Year Year Ended Period Ended Ended December 31, December 31, March 31, 2000 1999 1999 (pound) $ (pound) (pound) (Amounts in millions) Earnings Pretax income from continuing operations 73 109 47 62 Adjustments to include distributed income of less than 50% owned persons -- -- -- -- Add: Amortization charge on capitalized interest -- -- -- -- Less: Interest capitalized in the period -- -- -- -- --- --- --- --- Total earnings before fixed charges 73 109 47 62 === === === === Fixed charges Interest expense 116 173 87 126 Interest capitalized -- -- -- -- --- --- --- --- Total fixed charges 116 173 87 126 === === === === Total earnings and fixed charges 189 282 134 188 === === === === Ratio of earnings/fixed charges 1.6 1.6 1.5 1.4 === === === === INCLUDING THE RESULTS OF THE GENERATION BUSINESS Nine Month Year Year Ended Period Ended Ended December 31, December 31, March 31, 2000 1999 1999 (pound) $ (pound) (pound) (Amounts in millions) Earnings Pretax income from operations 73 109 47 68 Adjustments to include distributed income of less than 50% owned persons -- -- -- -- Add: Amortization charge on capitalized interest -- -- -- -- Less: Interest capitalized in the period -- -- -- -- --- --- --- --- Total earnings before fixed charges 73 109 47 68 === === === === Fixed charges Interest expense 116 173 87 129 Interest capitalized -- -- -- -- --- --- --- --- Total fixed charges 116 173 87 129 === === === === Total earnings and fixed charges 189 282 134 197 === === === === Ratio of earnings/fixed charges 1.6 1.6 1.5 1.5 === === === ===