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Directors' and key management remuneration (Tables)
 12 Months Ended
Dec. 31, 2023
Disclosure Of Directors And Key Management Remuneration [Abstract]  
Summary of aggregate remuneration Aggregate remuneration, calculated in accordance with the UK Companies Act 2006, of the Directors of the parent companies was as follows.
2023
US$'000
2022
US$'000
2021
US$'000
Emoluments
7,461
6,726
6,568
Long-term incentive plans
8,746
4,691
1,587
16,207
11,417
8,155
Pension contributions: defined contribution plans
20
10
9
Summary of aggregate compensation, representing the expense Aggregate compensation, representing the expense recognised, under IFRS as defined in the “Basis of preparation” section, of the Group’s key
management, including directors, was as follows.
2023
US$'000
2022
US$'000
2021
US$'000
Short-term employee benefits and costs
16,159
14,258
18,184
Post-employment benefits
155
174
300
Employment termination benefits
155
—
—
Share-based payments
10,305
10,846
10,303
Total
26,774
25,278
28,787