Property, plant and equipment is held at cost less accumulated depreciation and any accumulated impairment losses.

Depreciation of property, plant and equipment is provided to write off the cost, less residual value, on a straight-line basis over their useful economic lives as follows:

• Leasehold premises with lease terms of 50 years or less are depreciated over the remaining period of the lease;
• Leasehold improvements are depreciated over the period of the lease to a maximum of 25 years;
• Motor vehicles are depreciated over 3 years;
• Fixtures, fittings and equipment are depreciated over 4 to 10 years according to the estimated life of the asset;
• Computer equipment is depreciated over 3 years; and
• Land is not depreciated.

Depreciation is expensed to the income statement within operating expenses.

Residual values, remaining useful economic lives and depreciation periods and methods are reviewed annually and adjusted if appropriate.