| Income | — | — |
| Revenue from operations | 1,881.38a | 1,785.25a |
| Other income | 27.24a | 26.41a |
| Total income | 1,908.62a | 1,811.66a |
| Expenses | — | — |
| Fuel cost | -1,015.15a | -983.12a |
| Electricity purchased for trading | -55.18a | -56.83a |
| Employee benefits expense | -67.96a | -65.92a |
| Finance costs | -131.68a | -120.48a |
| Depreciation, amortization and impairment expense | -174.01a | -162.04a |
| Other expenses | -201.82a | -168.21a |
| Total expenses | -1,645.8a | -1,556.6a |
| Profit before share of profits of joint ventures accounted for using equity method, tax and regulatory deferral account balances | 262.83a | 255.06a |
| Add: share of profits of joint ventures accounted for using equity method | 22.14a | 16.36a |
| Profit before tax and regulatory deferral account balances | 284.96a | 271.41a |
| Tax expense | — | — |
| Current tax | — | — |
| Current year | -45.11a | -44.57a |
| Earlier years | -4.39a | -1.61a |
| Deferred tax | -41.74a | -25.13a |
| Total tax expense | -82.45a | -68.09a |
| Profit before regulatory deferral account balances | 202.51a | 203.32a |
| Net movement in regulatory deferral account balances (net of tax) | 37.02a | 10a |
| Profit for the year | 239.53a | 213.32a |
| Profit attributable to | — | — |
| Owners of the parent company | 234.22a | 208.12a |
| Non-controlling interests | 5.31a | 5.21a |