## Intangible assets (other than goodwill) arising on business combinations – Note 15 

An intangible asset is capitalised separately from goodwill as part of a business combination at cost (fair value at date of acquisition) to the extent that it is probable that the expected future economic benefits attributable to the asset will flow to the Group and that its cost can be measured reliably. 

Subsequent to initial recognition, intangible assets are carried at cost less any accumulated amortisation and any accumulated impairment losses. The carrying values of definite-lived intangible assets (the Group does not currently have any indefinite-lived intangible assets other than goodwill) are reviewed for indicators of impairment at each reporting date and are subject to impairment testing when events or changes in circumstances indicate that the carrying values may not be recoverable. 

The amortisation of intangible assets is calculated to write off the book value of definite-lived intangible assets over their useful lives on a straight-line basis on the assumption of zero residual value. In general, definite-lived intangible assets are amortised over periods ranging from one to ten years, depending on the nature of the intangible asset. 

Amortisation periods, useful lives, expected patterns of consumption and residual values are reviewed at each financial year-end. Changes in the expected useful life or the expected pattern of consumption of future economic benefits embodied in the asset are accounted for by changing the amortisation period or method as appropriate on a prospective basis. 

## Other financial assets – Note 16 

All investments are initially recognised at the fair value of the consideration given plus any directly attributable transaction costs. Where equity investments are actively traded in organised financial markets, fair value is determined by reference to Stock Exchange quoted market bid prices at the close of business on the balance sheet date. Unquoted equity investments are recorded at historical cost and are included within financial assets in the Consolidated Balance Sheet given that it is impracticable to determine fair value in accordance with IAS 39 Financial Instruments: Recognition and Measurement . Where non- derivative financial assets meet the definition of “loans and receivables” under IAS 39, such balances are, following initial recognition, recorded at amortised cost using the effective interest method less any allowance for impairment. Gains and losses are recognised in profit or loss when the loans and receivables are derecognised or impaired as well as through the amortisation process. 

## Leases – Notes 4 and 30 

Leases where the lessor retains substantially all the risks and rewards of ownership are classified as operating leases. Operating lease rentals are charged to the Consolidated Income Statement on a straight-line basis over the lease term. 

## Inventories and construction contracts – Note 17 

Inventories are stated at the lower of cost and net realisable value. Cost is based on the first-in, first-out principle (and weighted average, where appropriate) and includes all expenditure incurred in acquiring the inventories and bringing them to their present location and condition. Raw materials are valued on the basis of purchase cost on a first-in, first-out basis. In the case of finished goods and work-in-progress, cost includes direct materials, direct labour and attributable overheads based on normal operating capacity and excludes borrowing costs. 

Net realisable value is the estimated proceeds of sale less all further costs to completion, and less all costs to be incurred in marketing, selling and distribution. Estimates of net realisable value are based on the most reliable evidence available at the time the estimates are made, taking into consideration fluctuations of price or cost directly relating to events occurring after the end of the period, the likelihood of short-term changes in buyer preferences, product obsolescence or perishability (all of which are generally low given the nature of the Group’s products) and the purpose for which the inventory is held. Materials and other supplies held for use in the production of inventories are not written down below cost if the finished goods, in which they will be incorporated, are expected to be sold at or above cost. 

Amounts recoverable on construction contracts, which are included in receivables, are stated at the net invoiced value of the work done less amounts received as progress payments on account. Cumulative costs incurred, net of 

amounts transferred to cost of sales, after deducting foreseeable losses, provisions for contingencies and payments on account not matched with revenue, are included as construction contract balances in inventories. Cost includes all expenditure directly related to specific projects and an allocation of fixed and variable overheads incurred in the Group’s contract activities based on normal operating capacity. 

## Trade and other receivables – Note 18 

Trade receivables are carried at original invoice amount less an allowance for potentially uncollectible debts. Provision is made when there is objective evidence that the Group will not be in a position to collect the associated debts. Bad debts are written-off in the Consolidated Income Statement on identification. 

## Cash and cash equivalents – Note 23 

Cash and cash equivalents comprise cash balances held for the purpose of meeting short-term cash commitments and investments which are readily convertible to a known amount of cash and are subject to an insignificant risk of change in value. Bank overdrafts are included within current interest-bearing loans and borrowings in the Consolidated Balance Sheet. Where the overdrafts are repayable on demand and form an integral part of cash management, they are netted against cash and cash equivalents for the purposes of the Consolidated Statement of Cash Flows. 

## Liquid investments – Note 23 

Liquid investments comprise short-term deposits and current asset investments which are held as readily disposable stores of value and include investments in government gilts and commercial paper and deposits of less than one year in duration. As the maturity of these investments is greater than three months, these investments are treated as financial assets and are categorised as either “held-for-trading” or “loans and receivables”. Where relevant, the fair value of liquid investments is determined by reference to the traded value of actively traded instruments. 

## Derivative financial instruments and hedging practices – Note 25 

In order to manage interest rate, foreign currency and commodity risks and to realise the desired currency profile of borrowings, the Group employs derivative financial instruments (principally interest rate swaps, currency swaps and forward foreign exchange contracts). 

At the inception of a derivative transaction, the Group documents the relationship between the hedged item and the hedging instrument together with its risk management objective and the strategy underlying the proposed transaction. The Group also documents its assessment, both at the inception of the hedging relationship and subsequently on an ongoing basis, of the effectiveness of the hedging instrument in offsetting movements in the fair values or cash flows of the hedged items. 

Derivative financial instruments are stated at fair value. Where derivatives do not fulfil the criteria for hedge accounting, changes in fair values are reported in the Consolidated Income Statement. The fair value of interest rate and currency swaps is the estimated amount the Group would pay or receive to terminate the swap at the balance sheet date taking into account interest and currency rates at that date and the creditworthiness of the swap counterparties. The fair value of forward exchange contracts is calculated by reference to forward exchange rates for contracts with similar maturity profiles and equates to the quoted market price at the balance sheet date (being the present value of the quoted forward price). 

## Fair value and cash flow hedges 

The Group uses fair value hedges and cash flow hedges in its treasury activities. For the purposes of hedge accounting, hedges are classified either as fair value hedges (which entail hedging the exposure to movements in the fair value of a recognised asset or liability or an unrecognised firm commitment that could affect profit or loss) or cash flow hedges (which hedge exposure to fluctuations in future cash flows derived from a particular risk associated with a recognised asset or liability, or a highly probable forecast transaction that could affect profit or loss). 

Where the conditions for hedge accounting are satisfied and the hedging instrument concerned is classified as a fair value hedge, any gain or loss stemming from the re-measurement of the hedging instrument to fair value is reported in the Consolidated Income Statement. In addition, any gain or loss on 

