Tangible fixed assets are measured at cost less accumulated depreciation and any accumulated impairment losses. Depreciation is provided at rates calculated to write off the cost of the fixed assets, less their estimated residual value, over their expected useful lives on the following bases:
No depreciation is provided on the company's freehold properties since in the opinion of the directors the expected useful lives are sufficiently long and the estimated residual values are sufficiently high that any such depreciation would be immaterial. The directors undertake an annual impairment review of these properties.