Summary of significant accounting policies and key accounting estimates:The principal accounting policies applied in the preparation of these financial statements are set out below. These policies have been consistently applied to all the years presented, unless otherwise stated.Basis of preparation:These abridged financial statements have been prepared using the historical cost convention except that as disclosed in the accounting policies certain items are shown at fair value.Tangible assets:Tangible assets are stated in the statement of financial position at cost, less any subsequent accumulateddepreciation and subsequent accumulated impairment losses. The cost of tangible assets includes directly attributable incremental costs incurred in their acquisition and installation.Cash and cash equivalentsCash and cash equivalents comprise cash on hand and call deposits, and other short-term highly liquidinvestments that are readily convertible to a known amount of cash and are subject to an insignificant risk ofchange in value.Trade debtors:Trade debtors are recognised initially at the transaction price. They are subsequently measured at amortised cost using the effective interest method, less provision for impairment. A provision for the impairment of trade debtors is established when there is objective evidence that the company will not be able to collect all amounts due according to the original terms of the receivables.Stocks:Stocks are stated at the lower of cost and estimated selling price less costs to complete and sell. Cost isdetermined using the first-in, first-out (FIFO) method.The cost of finished goods and work in progress comprises direct materials and, where applicable, direct labour costs and those overheads that have been incurred in bringing the inventories to their present location and condition. At each reporting date, stocks are assessed for impairment. If stocks are impaired, the carrying amount is reduced to its selling price less costs to complete and sell; the impairment loss is recognised immediately in profit or loss.Trade creditors:Accounts payable are classified as current liabilities if the company does not have an unconditional right, at the end of the reporting period, to defer settlement of the creditor for at least twelve months after the reporting date. If there is an unconditional right to defer settlement for at least twelve months after the reporting date, they are presented as non-current liabilities. Trade creditors are recognised initially at the transaction price and subsequently measured at amortised cost using the effective interest method.Leases:Leases in which substantially all the risks and rewards of ownership are retained by the lessor are classified as operating leases. Payments made under operating leases are charged to profit or loss on a straight-line basis over the period of the lease.Share capital:Ordinary shares are classified as equity. Equity instruments are measured at the fair value of the cash or other resources received or receivable, net of the direct costs of issuing the equity instruments. If payment is deferred and the time value of money is material, the initial measurement is on a present value basis.