Inventories comprise goods held for resale, fuel and other consumable goods. Inventories are valued at the lower of cost and net realisable value as provided in IAS 2 "Inventories". Goods held for resale and consumables are valued using the weighted average cost basis. Net realisable value represents the estimated selling price less all estimated costs of completion and costs to be incurred in marketing, selling and distribution. It also takes into account slow-moving, obsolete and defective inventory. Fuel stocks are valued at calculated average cost. Costs include all direct expenditure and other appropriate attributable costs incurred in bringing inventories to their present location and condition. There has been no security granted over inventory unless stated otherwise.

The Group have a mix of grocery and non-food items within inventory which have different characteristics. For example, grocery lines have high inventory turnover, while non-food lines are typically held within inventory for a longer period of time and so run a higher risk of obsolesence. As inventories are carried at the lower of cost and net realisable value, this requires the estimation of the eventual sales price of goods to customers in the future. Judgement is applied when estimating the impact on the carrying value of inventories such as slow-moving, obsolete and defective inventory, which includes reviewing the quantity, age and condition of inventories throughout the year.

Loans and receivables

Loans and receivables are non-derivative financial assets with fixed or determinable payments that are not quoted in an active market. They are included in current assets, except for maturities greater than 12 months after the end of the reporting period, which are classified as non-current assets. The Group's loans and receivables comprise "Trade and other Receivables" in the Balance sheet.

Trade and other receivables

Trade receivables are recognised initially at fair value and subsequently measured at amortised cost using the effective interest method, less provision for impairment.

Other receivables are non-interest bearing and are recognised initially at fair value, and subsequently at amortised cost, reduced by appropriate allowances for estimated irrecoverable amounts.

Provision for impairment of trade receivables

A provision for impairment of trade receivables is established when there is objective evidence that the Group will not be able to collect all amounts due according to the original terms of the receivables. Significant financial difficulties of the debtor, probability that the debtor will enter bankruptcy or financial reorganisation, and default or delinquency in payments (more than 30 days overdue) are considered indicators that the trade receivable is impaired. The amount of the provision is the difference between the asset's carrying amount and the present value of estimated future cash flows, discounted at the original effective interest rate. The carrying amount of the asset is reduced through the use of an allowance account and the amount of the loss is recognised in the income statement within administrative expenses. When a trade receivable is considered uncollectible, it is written off against the allowance account for trade receivables. Subsequent recoveries of amounts previously written off are credited against administrative expenses in the income statement. The outcome depends on future events which are by their nature uncertain. In assessing the likely outcome, management bases its assessment on historical experience and other factors that are believed to be reasonable in the circumstances.

Cash and cash equivalents

Cash and cash equivalents comprise cash at bank and in hand, demand deposits with banks and short-term deposits with a maturity of three months or less at the date of acquisition. Cash at bank and in hand and short-term deposits are shown under current assets on the Consolidated balance sheet. The carrying amount of these assets approximates to their fair value. They are therefore included as a component of cash and cash equivalents.

Financial liabilities and equity instruments

Financial liabilities and equity instruments are classified according to the substance of the contractual arrangements entered into. An equity instrument is any contract that gives a residual interest in the assets of the Group after deducting all of its liabilities.

Trade and other payables

Trade and other payables are initially recognised at fair value and subsequently at amortised cost, using the effective interest rate method.