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Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2020
Disclosure Of Summary Of Significant Accounting Policies [Abstract]  
Summary of Depreciation on Property, Plant and Equipment Over Their Expected Useful Economic Life

Depreciation is provided on property, plant and equipment over their expected useful economic life as follows:

 

Asset class

 

Depreciation method and period

Office and computer equipment

 

Straight-line over 3 years

Fixtures and fittings

 

Straight-line over 5 years, or, for non-removable items, the remaining term of an associated lease, whichever is shorter

Right of use assets

 

Straight-line over the lease terms, which are between two and five years, or the estimated useful lives of the assets, whichever is shorter
Summary of Amortization Method and Amortization Period for the Principal Categories of Intangible Assets

The amortization method and amortization period for the principal categories of intangible assets are follows:

 

Asset class

 

Amortization method and period

Patents

 

Straight-line over 20 years

Computer software

 

Straight-line between 3 and 5 years