v3.26.1
Income taxes - Components of net loss before tax provision from income taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income taxes      
United Kingdom $ (225,456) $ (179,610) $ (182,980)
United States 6,648 5,814 3,773
Net loss before income tax provision $ (218,808) $ (173,796) $ (179,207)