Centrica Results Presentation Deck

Upstream - Nuclear NUCLEAR Period ended 30 June (£m) Adjusted operating profit (£) Nuclear power generated (GWh) Achieved power price (£/MWh) Achieved power price (£/MWh) H1 2020 H1 2021 46.5 53.0 2020 (16) 4,537 53.0 2021 (38) 4,171 (8%) 46.5 (12%) A 138% Power Generated Total (GWh) H1 2020 H1 2021 4,171 4,537 The above adjusted figures are before exceptional items and certain re-measurements. Adjusted operating profit includes share of joint ventures and associates after interest and taxation. A reconciliation of adjusted operating profit is provided in the Group Financial Review in the Interim Results announcement. 28 Interim Results 2021 centrica

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