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Revenue and contract balances (Tables)
 6 Months Ended
Jun. 30, 2018
Text block1 [abstract]  
Summary of Contract Assets and Contract Liabilities

Contract assets and contract liabilities were as follows:

 

      Six months
ended
30 June
2018		      Six months
ended
30 June
20171		     

Year

ended
31 December

20171

  
      £m      £m      £m  

Contract assets

         

Accrued income falling due within one year

      3,672.4        3,379.4        3,205.8  

Accrued income falling due after more than one year

      21.8        21.9        20.5  
       3,694.2        3,401.3        3,226.3  

Contract liabilities

         

Deferred income

      1,284.5        1,188.3        1,212.1  

Note

1 

Prior year figures have been restated for the impact of the adoption of IFRS 15: Revenue from Contracts with Customers, as described in note 2.