Deferred tax is recognised in respect of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for taxation purposes.
Deferred tax is not recognised for: temporary differences related to investments in subsidiaries and associates where the Group is able to control the timing of the reversal of the temporary difference and it is probable that this will not reverse in the foreseeable future; on the initial recognition of non-deductible goodwill; and on the initial recognition of an asset or liability in a transaction that is not a business combination and that, at the time of the transaction, does not affect the accounting or taxable profit.
Deferred tax assets are recognised to the extent that it is probable that future taxable profits will be available against which they can be used. Deferred tax assets are reviewed at each reporting date.
Deferred tax is measured on an undiscounted basis, and at the tax rates that have been enacted or substantively enacted by the reporting date that are expected to apply in the periods in which the asset or liability is settled. It is recognised in the income statement except when it relates to items credited or charged directly to other comprehensive income or equity, in which case the deferred tax is also recognised within other comprehensive income or equity respectively.
Deferred tax assets and liabilities are offset when they relate to income taxes levied by the same taxation authority, when the Group intends to settle its current tax assets and liabilities on a net basis and that authority permits the Group to make a single net payment.