Intangible assets are initially recorded at cost, and are subsequently stated at cost less any accumulated amortisation and impairment losses. Any intangible assets carried at revalued amounts, are recorded at the fair value at the date of revaluation, as determined by reference to an active market, less any subsequent accumulated amortisation and subsequent accumulated impairment losses.

Intangible assets acquired as part of a business combination are only recognised separately from goodwill when they arise from contractual or other legal rights, are separable, the expected future economic benefits are probable and the cost or value can be measured reliably.

Amortisation is calculated so as to write off the cost of an asset, less its estimated residual value, over the useful life of that asset as follows:

Development costs - 10% straight line

If there is an indication that there has been a significant change in amortisation rate, useful life or residual value of an intangible asset, the amortisation is revised prospectively to reflect the new estimates.

Tangible assets are initially recorded at cost, and subsequently stated at cost less any accumulated depreciation and impairment losses. Any tangible assets carried at revalued amounts are recorded at the fair value at the date of revaluation less any subsequent accumulated depreciation and subsequent accumulated impairment losses.

An increase in the carrying amount of an asset as a result of a revaluation, is recognised in other comprehensive income and accumulated in equity, except to the extent it reverses a revaluation decrease of the same asset previously recognised in profit or loss. A decrease in the carrying amount of an asset as a result of revaluation, is recognised in other comprehensive income to the extent of any previously recognised revaluation increase accumulated in equity in respect of that asset. Where a revaluation decrease exceeds the accumulated revaluation gains accumulated in equity in respect of that asset, the excess shall be recognised in profit or loss.

A review for indicators of impairment is carried out at each reporting date, with the recoverable amount being estimated where such indicators exist. Where the carrying value exceeds the recoverable amount, the asset is impaired accordingly. Prior impairments are also reviewed for possible reversal at each reporting date.

For the purposes of impairment testing, when it is not possible to estimate the recoverable amount of an individual asset, an estimate is made of the recoverable amount of the cash-generating unit to which the asset belongs. The cash-generating unit is the smallest identifiable group of assets that includes the asset and generates cash inflows that largely independent of the cash inflows from other assets or groups of assets.

For impairment testing of goodwill, the goodwill acquired in a business combination is, from the acquisition date, allocated to each of the cash-generating units that are expected to benefit from the synergies of the combination, irrespective of whether other assets or liabilities of the company are assigned to those units.

Research expenditure is written off in the period in which it is incurred.

Development expenditure incurred is capitalised as an intangible asset only when all of the following criteria are met:

- It is technically feasible to complete the intangible asset so that it will be available for use or sale;

- There is the intention to complete the intangible asset and use or sell it;

- There is the ability to use or sell the intangible asset;

- The use or sale of the intangible asset will generate probable future economic benefits;

- There are adequate technical, financial and other resources available to complete the development and to use or sell the intangible asset; and

- The expenditure attributable to the intangible asset during its development can be measured reliably.

Expenditure that does not meet the above criteria is expensed as incurred.