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Unaudited Condensed Consolidated Interim Statement of Changes in Equity (Parenthetical) - GBP (£) £ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Statement of changes in equity [abstract] |  |  |
Total comprehensive income for the period | £ 360.8 | £ 388.3 | £ 978.6

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