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Related party transactions (Details)	3 Months Ended					9 Months Ended
	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 £ / shares shares	Dec. 31, 2023 £ / shares shares
Related party transactions
General and administrative	$ 18,257,000		$ 16,281,000			$ 50,588,000	$ 45,557,000
Ordinary shares, shares issued | shares								69,015,971	42,431,766
Ordinary shares, nominal value | £ / shares								£ 0.01	£ 0.01
Aggregate purchase price		$ 544,127,000	234,492,000	$ 12,127,000	$ 2,716,000
Affiliated Entity | Consultancy services with Stone Sunny Isles Inc.
Related party transactions
General and administrative	$ 48,000		$ 49,000			100,000	$ 200,000
Affiliated Entity | Baker Bros. Advisors LP | Non voting ordinary shares
Related party transactions
Ordinary shares, shares issued | shares								17,114,846
Ordinary shares, nominal value | £ / shares								£ 0.01
Aggregate purchase price						$ 366,600,000

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