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Deferred tax | 6 Months Ended
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Dec. 31, 2021
Deferred tax |
Deferred tax | 18 Deferred tax Deferred tax assets and liabilities are offset where the Group has a legally enforceable right to do so. The following is the analysis of the deferred tax balances (after allowable offset) for financial reporting purposes: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 31 December | ​ | 30 June | ​ | 31 December
​ |  | 2021 |  | 2021 |  | 2020
​ | ​ | £’000 | ​ | £’000 | ​ | £’000
US deferred tax assets (1) |  | — |  | — |  | (61,786)
UK deferred tax liabilities |  | 30,422 |  | 35,546 |  | 30,851
Net deferred tax liability/(asset) |  | 30,422 |  | 35,546 |  | (30,935)
​ The movements in the net deferred tax liability/(asset) are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 31 December | ​ | 30 June | ​ | 31 December
​ |  | 2021 |  | 2021 | ​ | 2020
​ | ​ | £’000 | ​ | £’000 | ​ | £’000
At the beginning of the period |  | 35,546 |  | (27,025) |  | (27,025)
(Credited)/expensed to the statement of profit or loss (note 11) |  | (5,415) |  | 64,019 |  | (2,046)
Expensed/(credited) to other comprehensive income (note 11) |  | 291 |  | (1,448) |  | (1,864)
At the end of the period |  | 30,422 |  | 35,546 |  | (30,935)
(1) | During the three months ended 30 June 2021, the deferred tax assets were written down to the extent that they will not shelter profits arising from the unwind of the deferred tax liability. This is due to a change in the substantively enacted UK Corporation tax rate from 19% to 25%, effective April 2023. The current US federal corporate income tax rate is 21%. As a result of this change the US deferred tax asset is no longer forecast to give rise to a future economic benefit. It is expected that any future US tax payable will be sheltered by future foreign tax credits arising from UK tax payable. Future increases in the US federal corporate income tax rate could result in a reversal of the US deferred tax asset write down.
​ 18 Deferred tax (continued) Significant estimates – recognition of deferred tax assets Deferred tax assets are recognized only to the extent that it is probable that the associated deductions will be available for use against future profits and that there will be sufficient future taxable profit available against which the temporary differences can be utilized, provided the asset can be reliably quantified. In estimating future taxable profit, management use “base case” approved forecasts which incorporate a number of assumptions, including a prudent level of future uncontracted revenue in the forecast period. In arriving at a judgment in relation to the recognition of deferred tax assets, management considers the regulations applicable to tax, advice on their interpretation and potential future business planning. Future taxable income may be higher or lower than estimates made when determining whether it is appropriate to record a tax asset and the amount to be recorded. Furthermore, changes in the legislative framework or applicable tax case law may result in management reassessing the recognition of deferred tax assets in future periods.

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- References No definition available. + Details
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- Definition The disclosure of deferred taxes. [Refer: Deferred tax liabilities; Deferred tax assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_10_e&doctype=Standard -URIDate 2020-01-01 + Details
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