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Accounting policies (Tables) | 6 Months Ended
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Jun. 30, 2018
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Summary of the Impact of Adopting IFRS 15 | The following table summarises the impact of adopting IFRS 15 on the Group’s consolidated income statement for the six months ended 30 June 2017 and the year end 31 December 2017.
|  | Six months ended 30 June 2017 |  |  | Year ended 31 December 2017 |
|  | As previously reported |  |  | IFRS 15 adjustments |  |  | As restated |  |  | As previously reported |  |  | IFRS 15 adjustments |  |  | As restated |
|  | £m |  |  | £m |  |  | £m |  |  | £m |  |  | £m |  |  | £m |
Revenue |  |  | 7,403.6 |  |  |  | 246.8 |  |  |  | 7,650.4 |  |  |  | 15,265.4 |  |  |  | 538.8 |  |  |  | 15,804.2 |
Costs of services |  |  | (6,035.5 | ) |  |  | (246.8 | ) |  |  | (6,282.3 | ) |  |  | (12,090.2 | ) |  |  | (538.8 | ) |  |  | (12,629.0 | )
Gross profit |  |  | 1,368.1 |  |  |  | — |  |  |  | 1,368.1 |  |  |  | 3,175.2 |  |  |  | — |  |  |  | 3,175.2 |

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- Definition Disclosure of impact of adoption of ifrs 15. + References No definition available. + Details
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