Income tax expense represents the sum of the tax currently payable and deferred tax.
The tax currently payable is based on taxable profit for the year. Taxable profit differs from profit as reported in the statement of comprehensive income because of items of income or expense that are taxable or deductible in other years and items that are never taxable or deductible. The company's liability for current tax is calculated using tax rates that have been enacted or substantively enacted by the end of the reporting period.
The company does not recognise Deferred tax in the Accounts.
Current tax for the year is recognised in profit or loss, except when they related to items that are recognised in other comprehensive income or directly in equity, in which case, the current and deferred tax is also recognised in other comprehensive income or directly in equity respectively.
Research and development tax credits are estimated and claimed each year using the HMRC rules and guidelines applicable. Refunds approved by HMRC are recognised in the income statement in the period in which they are actually received due to the uncertainties involved.