REVENUE - Schedule of Disaggregation of Revenue by Geographic Segment (Details) £ in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($)	Mar. 31, 2025 GBP (£)	Mar. 31, 2024 USD ($)	Mar. 31, 2024 GBP (£)
Disaggregation of Revenue [Line Items]
TOTAL NET REVENUE	$ 225,651	£ 225,651	$ 349,871	£ 349,871
Total net revenue, Change (in percent)	(35.50%)	(35.50%)
North America
Disaggregation of Revenue [Line Items]
TOTAL NET REVENUE		£ 186,338		318,536
Total net revenue, Change (in percent)	(41.50%)	(41.50%)
Foreign
Disaggregation of Revenue [Line Items]
TOTAL NET REVENUE		£ 39,313		£ 31,335
Total net revenue, Change (in percent)	25.50%	25.50%