COMBINED FINANCIAL STATEMENTS Accounting policies  (continued) Goodwill and intangible assets Finance leases Operating leases Financial instruments Tangible fixed assets Investments Inventories and pre-publication costs Prior year adjustment On the acquisition of a subsidiary, associate, joint venture or business, the purchase consideration is allocated between the underlying net tangible and intangible assets on a fair value basis, with any excess purchase consideration representing goodwill. Acquired goodwill and intangible assets are capitalised and amortised systematically over their estimated useful lives up to a maximum of 40 years, subject to annual impairment review. For the majority of acquired goodwill and intangible assets, the maximum estimated useful life is 20 years, which is the rebuttable presumption under UK GAAP. In view of the longevity of certain of the goodwill and intangible assets relating to acquired science and medical and educational publishing businesses, this presumption has been rebutted in respect of these assets and a maximum estimated useful life of 40 years determined. The longevity of these assets is evidenced by their long established and well regarded brands and imprints, and their characteristically stable market positions. Intangible assets comprise publishing rights and titles, databases, exhibition rights and other intangible assets, which are stated at fair value on acquisition and are not subsequently revalued. Tangible fixed assets are stated in the balance sheet at cost less accumulated depreciation. No depreciation is provided on freehold land. Freehold buildings and long leases are depreciated over their estimated useful lives up to a maximum of 50 years. Short leases are written off over the duration of the lease. Plant, equipment and computer systems are depreciated on a straight line basis at rates from 5%–33%. Fixed asset investments in joint ventures and associates are accounted for under the gross equity and equity methods respectively. Other fixed asset investments are stated at cost, less provision, if appropriate, for any impairment in value. Short term investments are stated at the lower of cost and net realisable value. Inventories and pre-publication costs are stated at the lower of cost, including appropriate attributable overheads, and estimated net realisable value. Pre-publication costs, representing costs incurred in the origination of content prior to publication, are expensed systematically over the economic lives of the related products, generally up to five years. Assets held under leases which confer rights and obligations similar to those attaching to owned assets are capitalised as tangible fixed assets and the corresponding liability to pay rentals is shown net of interest in the accounts as obligations under finance leases. The capitalised values of the assets are written off on a straight line basis over the shorter of the periods of the leases or the useful lives of the assets concerned. The interest element of the lease payments is allocated so as to produce a constant periodic rate of charge. Operating lease rentals are charged to the profit and loss account on a straight line basis over the period of the leases. Payments and receipts on interest rate hedges are accounted for on an accruals basis over the lives of the hedges and included respectively within interest payable and interest receivable in the profit and loss account. Gains and losses on foreign exchange hedges, other than in relation to net currency borrowings hedging equity investments, are recognised in the profit and loss account on maturity of the underlying transaction. Gains and losses on net currency borrowings hedging equity investments are taken to reserves. Gains and losses arising on hedging instruments that are closed out due to the cessation of the underlying exposure are taken directly to the profit and loss account. Currency swap agreements are valued at exchange rates ruling at the balance sheet date with net gains and losses being included within short term investments or borrowings. Interest payable and receivable arising from the swap is accounted for on an accruals basis over the life of the swap. Finance costs associated with debt issuances are charged to the profit and loss account over the life of the related borrowings. Following the issuance of UITF38: Accounting for ESOP Trusts in December 2003, shares held in the parent companies by the Reed Elsevier Group plc Employee Benefit Trust, previously included within other fixed asset investments, are now presented as shares held in treasury and deducted within combined shareholders’ funds. Prior year comparatives have been restated accordingly. REED ELSEVIER ANNUAL REPORTS & FINANCIAL STATEMENTS 2003 41