Property, plant and equipment
Property, plant and equipment are stated at cost less accumulated depreciation and any impairment in value. Land is not depreciated. The cost less estimated residual value of other property, plant and equipment is depreciated on a straight line basis over the estimated useful lives of the assets.
The carrying values of property, plant and equipment are reviewed for impairment when events or changes in circumstances indicate that carrying value may / not be recoverable. If any such indication exists and where the carrying values exceed the estimated recoverable amount, the assets are written down to their recoverable amount, being the higher of their fair value less costs to sell and their value in use.