Notes to the Consolidated Financial Statements

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for the year to 31 December 2007

17. Construction contracts

2007 2006
£m £m
Contracts in progress at the balance sheet date:    
Amounts due from contract customers included in trade and other receivables 57.3 65.2
Amounts due to contract customers included in trade and other payables (39.1) (26.1)
18.2 39.1
Contract costs incurred plus recognised profits less recognised losses to date. 3,684.8 3,571.4
Less: progress billings (3,666.6) (3,532.3)
18.2 39.1

At 31 December 2007, retentions held by customers for contract work amounted to £11.1m (2006: £12.6m).