The carrying value of assets is reviewed annually to assess whether there is any indication of impairment. If any such indication exists, the recoverable amount of the asset is estimated. Where the carrying value exceeds the estimated recoverable amount, such assets are written down to their recoverable amount.

The recoverable amount of cash-generating units to which goodwill is allocated is estimated annually on March 31 each year. For assets that have an indefinite useful life and intangible assets that are not yet available for use, the recoverable amount is estimated at each statement of financial position date.

Impairment losses are recognised whenever the carrying amount of the asset or a cash-generating unit exceeds its recoverable amount. Impairment losses are recognised in the income statement.

Impairment losses recognised in respect of cash-generating units are allocated first to reduce the carrying amount of any goodwill allocated to cash-generating units and then to reduce the carrying amount of the other assets in the unit on a pro rata basis.

A cash-generating unit is the smallest identifiable asset group that generates cash flows that largely are independent from other assets and groups.

Financial assets are impaired where there is objective evidence that, as a result of one or more events that occurred after the initial recognition of the financial asset, the estimated future cash flows of the investment have been impacted.

An impairment loss in respect of an available-for-sale financial asset is calculated by reference to its current fair value. For unlisted shares classified as available-for-sale, a significant or prolonged decline in the fair value of the security below its cost is considered to be objective evidence of impairment.

When a decline in the fair value of an available-for-sale financial asset has been recognised directly in equity and there is objective evidence that the asset is impaired, the cumulative loss that had been recognised directly in equity is recognised in the income statement even though the financial asset has not been derecognised. The amount of the cumulative loss that is recognised in the income statement is the difference between the acquisition cost and current fair value, less any impairment loss on that financial asset previously recognised in the income statement.

The recoverable amount of the Group’s investments in held-to-maturity securities and receivables carried at amortised cost is calculated as the present value of estimated future cash flows, discounted at the original effective interest rate (the effective interest rate is computed on initial recognition of these financial assets). Receivables with a short duration are not discounted. Individually significant financial assets are tested for impairment on an individual basis. The remaining financial assets are assessed collectively in groups that share similar credit risk characteristics.

In respect of trade receivables, receivables that are assessed not to be impaired individually are subsequently assessed for impairment on a collective basis. Objective evidence of impairment for a portfolio of receivables could include the Group’s past experience of collecting payments, an increase in the number of delayed payments in the portfolio past the average credit period, as well as observable changes in national or local economic conditions that correlate with default on receivables.

The recoverable amount of other assets is the greater of their fair value less costs to sell and their value in use. In assessing their value in use, the estimated future cash flows are discounted to their present value using a pre-tax discount rate that reflects current market assessments of the time value of money and the risks specific to the asset.

An impairment loss in respect of a held-to-maturity security or receivable carried at amortised cost is reversed if the subsequent increase in recoverable amount can be related objectively to an event occurring after the impairment loss was recognised.

An impairment loss in respect of an investment in an equity instrument classified as available-for-sale is not reversed through the income statement. If the fair value of a debt instrument classified as available-for-sale increases and the increase can be objectively related to an event occurring after the impairment loss was recognised in the income statement, the impairment loss is reversed, with the amount of the reversal recognised in the income statement.

The carrying amount of the financial asset is reduced by the impairment loss directly for all financial assets with the exception of trade receivables and banking advances, where the carrying amount is reduced through the use of an impairment allowance account. When a trade receivable or banking advance is considered uncollectible, it is written off against the impairment allowance account. Subsequent recoveries of amounts previously written off are credited against the allowance account. Changes in the carrying amount of the impairment allowance account are recognised in the income statement.

Impairment losses in respect of goodwill are not reversed.

In respect of other assets, impairment losses recognised in prior periods are assessed at each reporting date for any indications that the loss has decreased or no longer exists. Impairment losses are reversed if there has been a change in the estimates used to determine the recoverable amount.

Impairment losses are reversed only to the extent that the asset’s carrying amount does not exceed the carrying amount that would have been determined, net of depreciation or amortisation, if no impairment loss had been recognised.

Income taxation comprises current and deferred tax. Income tax expense is recognised in profit or loss except to the extent that it relates to items recognised directly in equity, in which case it is recognised in equity.

Current taxation comprises tax payable calculated on the basis of the expected taxable income for the year, using the tax rates enacted or substantially enacted at the balance sheet date, and any adjustment of tax payable for previous years.

Deferred taxation is recognised using the statement of financial position liability method based on temporary differences between the tax base of an asset or liability and its balance sheet carrying amount. Temporary differences are differences between the carrying amount of assets and liabilities for financial reporting purposes and their tax base. The amount of deferred tax provided is based on the expected manner of realisation or settlement of the carrying amount of assets and liabilities using tax rates enacted or substantively enacted at the statement of financial position date. The following temporary differences are not provided for: initial recognition of goodwill, the initial recognition of assets or liabilities in a transaction that is not a business combination and that affects neither accounting nor taxable profit, and differences relating to investments in subsidiaries to the extent that they will probably not reverse in the foreseeable future. Deferred taxation is charged to the income statement except to the extent that it relates to a transaction that is recognised directly in equity, or a business combination that is an acquisition. The effects on deferred taxation of any changes in tax rates is recognised in the income statement, except to the extent that it relates to items previously charged or credited directly to equity.

A deferred taxation asset is recognised to the extent that it is probable that future taxable profits will be available against which the associated unused tax losses and deductible temporary differences can be utilised. Deferred tax assets are reviewed at each reporting date and are reduced to the extent that it is no longer probable that the related tax benefit will be realised.

Secondary taxation on companies is accounted for as a tax charge in the income statement as incurred.

An associate is a company over which the Group has the ability to exercise significant influence, but not control, over its financial and operating policies.

The equity method of accounting for associates is adopted in the Group financial statements. In applying the equity method, account is taken of the Group’s share of accumulated retained earnings and movements in reserves from the effective dates on which the companies became associates and up to the effective dates of disposal. In the event of associates making losses, the Group recognises the losses to the extent of the Group’s exposure.

The Company carries its investment in associates at cost less any accumulated impairment losses.

Joint ventures are those entities over whose activities the Group has joint control, established by contractual agreement. The Group’s interests in joint ventures are accounted for using the proportionate consolidation method and its shares of the underlying assets, liabilities, income, expenditures and cash flows are included in the consolidated financial statements on a line-by-line basis from the date that joint control commences until the date joint control ceases.

The Company carries its investments in joint ventures at cost less accumulated impairment losses.