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Financial instruments (Tables) | 6 Months Ended
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Jun. 30, 2018
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Analysis of Financial Instruments Measured at Fair Value | The following table provides an analysis of financial instruments that are measured subsequent to initial recognition at fair value, grouped into levels 1 to 3 based on the degree to which the fair value is observable: Level 1 fair value measurements are those derived from quoted prices (unadjusted) in active markets for identical assets or liabilities; Level 2 fair value measurements are those derived from inputs other than quoted prices included within level 1 that are observable for the asset or liability, either directly (i.e. as prices) or indirectly (i.e. derived from prices); Level 3 fair value measurements are those derived from valuation techniques that include inputs for the asset or liability that are not based on observable market data (unobservable inputs).
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |
|  | £m |  |  | £m |  |  | £m |
30 June 2018 |  |  |  |  |  |  |  |  |  |  |  |
Derivatives in designated hedge relationships |  |  |  |  |  |  |  |  |  |  |  |
Derivative assets |  |  | — |  |  |  | — |  |  |  | — |
Derivative liabilities |  |  | — |  |  |  | (30.4 | ) |  |  | — |
Held at fair value through profit or loss |  |  |  |  |  |  |  |  |  |  |  |
Derivative assets |  |  | — |  |  |  | 2.1 |  |  |  | — |
Derivative liabilities |  |  | — |  |  |  | (2.2 | ) |  |  | — |
Payments due to vendors (earnout agreements) (note 18) |  |  | — |  |  |  | — |  |  |  | (542.9 | )
Liabilities in respect of put options |  |  | — |  |  |  | — |  |  |  | (261.2 | )
Equity investments |  |  |  |  |  |  |  |  |  |  |  |
Other investments |  |  | 224.4 |  |  |  | — |  |  |  | 724.9 |
Reconciliation of level 3 fair value measurements:
|  | Liabilities in respect of put options |  |  | Other investments |
|  | £m |  |  | £m |
1 January 2018 |  |  | (258.1 | ) |  |  | 820.3 |
Gains recognised in the income statement |  |  | 21.3 |  |  |  | 24.2 |
Losses recognised in other comprehensive income |  |  | — |  |  |  | (93.3 | )
Exchange adjustments |  |  | 5.5 |  |  |  | — |
Additions |  |  | (37.7 | ) |  |  | 27.5 |
Disposals |  |  | — |  |  |  | (53.5 | )
Reclassifications from other investments to interests in associates |  |  | — |  |  |  | (0.3 | )
Settlements |  |  | 7.8 |  |  |  | — |
30 June 2018 |  |  | (261.2 | ) |  |  | 724.9 |
Summary of Other Investments | Other investments include equity investments designated as fair value through profit or loss and fair value through other comprehensive income as follows:
|  | 30 June 2018 |
|  | £m |
Fair value through profit or loss |  |  | 295.9 |
Fair value through other comprehensive income |  |  | 653.4 |
|  |  | 949.3 |

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- Definition The disclosure of the fair value of financial instruments. [Refer: Financial instruments, class [member]; At fair value [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_10_e&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Disclosure of fair value of other investments in equity investments designated at fair value through profit or loss and other comprehensive income. + References No definition available. + Details
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