Income tax expense represents the sum of the tax currently payable and deferred tax.
Currnt and deferred taxation assets and liabilties are not discounted.
Current tax
Current tax is recognised at the amount of tax payable using the tax rate and laws that have been enacted or substantially enacted by the balance sheet date.
Deferred tax
Deferred tax is recognised on timing differences that have originated but not reversed at the balance sheet date.
Timing differences arise from the inclusion of income and expenses in tax assessments in periods different from those in which they are recognised in the financial statements. Deferred tax is measured using tax rates and laws that have been enacted or substantially enacted by the year end and that are expected to apply to the reversal of the timing difference.
Unrelived tax losses and other deferred tax assets are recognised only to the extent that it is probable that they will be recovered against the reversal of deferred tax liabilites or other future taxable profits.