Turnover is measured at the fair value of the consideration received or receivable, net of discounts and value added taxes. Turnover includes revenue earned from the rendering of services.

Revenue from the rendering of services is recognised by reference to the stage of completion of the contract. The stage of completion of a contract is measured by comparing the costs incurred for work performed to date to the total estimated contract costs. Turnover is only recognised to the extent of recoverable expenses when the outcome of a contract cannot be estimated reliably.

Deferred taxation is provided on the liability method to take account of timing differences between the treatment of certain items for accounts purposes and their treatment for tax purposes.

Tax deferred or accelerated is accounted for in respect of all material timing differences, in particular accelerated capital allowances and revaluation gains on investment properties. All deferred tax is charged/(credited) to the Income Statement.

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.