Tangible fixed assets are measured at cost less accumulated depreciation and any accumulated 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.
Depreciation is provided at rates calculated to write off the cost of the fixed assets, less their estimated residual value, over their expected useful life of that asset on the following bases: