Debt - UK Bilateral Revolving Credit Facility (Details) - Revolving Credit Facility - UK Bilateral Revolving Credit Facility - GBP (£)	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Maximum borrowing capacity	£ 140,000,000
Optional additional commitments	£ 125,000,000
Debt instrument, basis spread on variable rate	2.00%
Interest rate	7.30%	5.50%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details