Turnover is measured at the fair value of the consideration received or receivable, excluding discounts, rebates, value added tax and other sales taxes. Turnover from the sale of goods is recognised when goods have been delivered to customers such that risks and rewards of ownership have transferred to them. Turnover 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.

Tangible assets are included at cost less depreciation and impairment. Depreciation has been provided at the following rates in order to write off the assets over their estimated useful lives:

Inventories have been valued at the lower of cost and estimated selling price less costs to complete and sell. In respect of work in progress and finished goods, cost includes a relevant proportion of overheads according to the stage of manufacturing/completion.