| Income | — | — |
| Revenue from operations | 25,793.7a | 29,383.5a |
| Other income | 2,975.9a | 3,441.5a |
| Total income | 28,769.6a | 32,825a |
| Expenses | — | — |
| Purchase of electricity for trading | -399.8a | -1.7a |
| Employee benefits expense | -2,957.8a | -2,868.6a |
| Finance costs | -4,572.8a | -4,148.8a |
| Depreciation, amortisation & impairment expense | -5,571.4a | -3,964a |
| Other expenses | -4,265.7a | -4,211.5a |
| Total expenses | -17,767.5a | -15,194.6a |
| Profit/ (loss) before exceptional items and tax | 11,002.1a | 17,630.4a |
| Exceptional items | -788.5a | 296.3a |
| Profit before share in net profit of joint venture / associates, net movement in regulatory deferral account balance and tax | 11,790.6a | 17,334.1a |
| Share in profit of joint venture / associates | 41.9a | 42.5a |
| Profit before net movement in regulatory deferral account balance and tax | 11,832.5a | 17,376.6a |
| Tax expenses | — | — |
| Current tax | -2,017.5a | -2,990.9a |
| Adjustments relating to earlier years | -20.5a | -155.9a |
| Deferred tax | -583a | -533.8a |
| Profit before regulatory deferral account balances | 9,211.5a | 13,696a |
| Net movement in regulatory deferral account balances (net of tax) | -97.1a | -103a |
| Profit for the year | 9,114.4a | 13,593a |