Taxation  | 
6 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2022  | ||||||||||||||||||||||||||||||||||||||||||||||
| Disclosure of Taxation Text Block [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||
| Taxation | 7. Taxation 
 The major components of income tax credit in the interim condensed consolidated statement of profit or loss are: 
 
 
 The deferred tax credit relates to the net movements in specific deferred tax items in the period. A deferred tax asset on losses is only recognized to the extent that it matches deferred tax liabilities.  | 
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