Group income statement [axis] Business performance [member] Exceptional items and certain re-measurements [member] Results for the year [member] Profit or loss [table] Profit or loss [line items] Re-measurement and settlement of derivative energy contracts Operating costs before exceptional items and credit losses on financial assets Credit losses on financial assets Exceptional items - net loss on significant disposals Exceptional items - net restructuring cost reversals Interim dividend paid per ordinary share Exchange differences reclassified to Group Income Statement on disposal Share buyback programme Interests in joint ventures and associates Non-current trade and other receivables, and contract-related assets Securities Current trade and other receivables, and contract-related assets Current trade and other payables, and contract-related liabilities Non- current trade and other payables, and contract-related liabilities Group operating (loss)/profit before share of results of joint ventures and associates Adjustments for loss on disposals Adjustments for unrealised losses/(gains) arising from re-measurement of energy contracts Adjustments for exceptional charges reflected directly in operating profit Operating cash flows before payments relating to taxes and exceptional charges Payments relating to exceptional charges in operating costs classified as operating activities (Investments in)/disposal of joint ventures and associates classified as investing activities Settlement of securities classified as investing activities Purchase of securities classified as investing activities Share buyback programme classified as financing activities Proceeds from sale of forfeited share capital classified as financing activities Description of accounting policy for use of adjusted performance measures Description of accounting policy for exceptional items and certain re-measurements Disclosure of share of results of joint ventures and associates Disclosure of exceptional items and certain re-measurements Disclosure of sources of finance Description of accounting policy for cost of sales Description of accounting policy for remeasurement and settlement of energy contracts Description of accounting policy for share buyback programme Description of accounting policy for cloud computing arrangements Description of accounting policy for UK & EU emissions trading scheme Description of accounting poliicy for renewable certificates Description of accounting policy for overlift and underlift Description of accounting policy for securities Description of accounting policy for nuclear activity