_Notes:

_{(1) Fuel costs in respect of generation consists predominantly of coal, sustainable biomass and carbon dioxide (“CO2”) emissions allowances, together with pond fines, petcoke and oil.}

_{(2) Cost of power purchases represents power purchased in the market.}

_{(3) Grid charges include transmission network use of system charges (“TNUoS”), balancing services use of system charges (“BSUoS”) and distribution use of system charges (“DUoS”).}

_{(4) Other retail costs include broker fees, ROCs, LECs, metering and Feed-in Tariff levelisation.}

_{(5) Other operating and administrative expenses excluding depreciation, amortisation and unrealised gains and losses on derivative contracts include salaries, maintenance costs and other administrative expenses.}

_{(6) EBITDA is defined as profit before interest, tax, depreciation, amortisation and unrealised gains and losses on derivative contracts.}

_{(7) Calculated using underlying earnings, being profit attributable to equity shareholders adjusted to exclude the after-tax impact of unrealised gains and losses on derivative contracts and exceptional items.}