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Accounting policies (Tables)
 6 Months Ended
Jun. 30, 2018
Text block1 [abstract]  
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