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Reconciliation of operating profit to a headline operating profit | 12 Months Ended
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Dec. 31, 2019
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Reconciliation of operating profit to a headline operating profit | 32. Reconciliation of operating profit to a headline operating profit Reconciliation of operating profit to a headline operating profit:
Continuing operations: |  | 2019 £m |  |  | 2 0 18 1,2 £m |  |  | 2017 1 £m |
Operating profit |  |  | 1,295.9 |  |  |  | 1,245.3 |  |  |  | 1,577.9 |
Amortisation and impairment of acquired intangible assets |  |  | 121.5 |  |  |  | 201.8 |  |  |  | 138.0 |
Goodwill impairment |  |  | 47.7 |  |  |  | 176.5 |  |  |  | 27.1 |
Gains on disposal of investments and subsidiaries |  |  | (40.4 | ) |  |  | (237.9 | ) |  |  | (98.7 | )
(Gains)/losses on remeasurement of equity interests arising from a change in scope of ownership |  |  | (0.4 | ) |  |  | (2.0 | ) |  |  | 0.3 |
Investment write-downs |  |  | 7.5 |  |  |  | 2.0 |  |  |  | 91.7 |
Litigation settlement |  |  | (16.8 | ) |  |  | – |  |  |  | – |
Gain on sale of freehold property in New York |  |  | (7.9 | ) |  |  | – |  |  |  | – |
Restructuring and transformation costs |  |  | 153.5 |  |  |  | 265.5 |  |  |  | 56.8 |
Headline operating profit |  |  | 1,560.6 |  |  |  | 1,651.2 |  |  |  | 1,793.1 |
Notes
1 |  | Prior year figures have been re-presented in accordance with IFRS 5 Non-current Assets Held for Sale and Discontinued Operations, as described in the accounting policies.
2 |  | Figures have been restated as described in the accounting policies.
Headline operating profit is one of the metrics that management uses to assess the performance of the business.

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