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Derivative financial instruments (Tables) | 9 Months Ended
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Sep. 30, 2025
Derivative financial instruments |
Schedule of contractual notional amount for the derivative instruments | ​
​ | ​ | ​ | ​ | ​
​ |  | September 30, |  | December 31,
​ | ​ | 2025 | ​ | 2024
​ | ​ | $'m | ​ | $'m
​ | ​ | ​ | ​ | ​
Derivative instruments | ​ | ​ | ​ | ​
Embedded options within listed bonds(a) |  | 2,186.0 |  | 2,186.0
Foreign exchange swaps |  | — |  | 14.5
​ |  | 2,186.0 |  | 2,200.5
(a) | This relates to early redemption clauses within the Group’s Senior Notes (see note 15). On or after November 29, 2023, 2024, or 2025, the 2026 Notes may be redeemed (in whole or in part) at a price of 102.81250%, 101.40625% and 100.00000%, respectively. On or after September 18, 2024, the 2027 Notes may be redeemed (in whole or in part) at a price of 100.00000%. On or after November 29, 2024, 2025 or 2026, the 2028 Notes may be redeemed (in whole or in part) at a price of 103.12500%, 101.56250% and 100.00000%, respectively. On or after November 29, 2026, 2027 or 2028, the 2030 Notes may be redeemed (in whole or in part) at a price of 103.93750%, 101.96875% and 100.00000%, respectively. On or after November 29, 2027, 2028 or 2029, the 2031 Notes may be redeemed (in whole or in part) at a price of 104.12500%, 102.06250% and 100.00000%, respectively.
Schedule of fair value of derivative instruments | ​
​ | ​ | ​ | ​ | ​
​ |  | September 30, |  | December 31,
​ | ​ | 2025 | ​ | 2024
​ | ​ | $'m | ​ | $'m
​ | ​ | ​ | ​ | ​
Derivative instruments | ​ |  | ​ |
Embedded options within listed bonds |  | 64.2 |  | 29.4
Foreign exchange swaps |  | — |  | (10.2)
​ |  | 64.2 |  | 19.2
Schedule of changes in fair value of derivative instruments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three months ended |  | Nine months ended
​ | ​ | September 30, |  | September 30, | ​ | September 30, |  | September 30,
​ | ​ | 2025 | ​ | 2024 | ​ | 2025 | ​ | 2024
​ | ​ | $'m | ​ | $'m | ​ | $'m | ​ | $'m
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Derivative instruments |  |  |  |  |  |  |  |
Embedded options within listed bonds |  | 30.6 |  | 19.0 |  | 34.9 |  | 29.6
Foreign exchange swaps |  | 10.2 |  | 1.3 |  | 10.4 |  | 7.0
Interest rate caps | ​ | — | ​ | — | ​ | — | ​ | 0.2
​ |  | 40.8 |  | 20.3 |  | 45.3 |  | 36.8
​

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