Right of use of assets - Narrative (Details) $ in Thousands		1 Months Ended	12 Months Ended
	Oct. 09, 2023 USD ($)	Apr. 30, 2023 GBP (£)	Dec. 31, 2024 GBP (£)	Dec. 31, 2024 USD ($)	Dec. 31, 2024 GBP (£)	Jun. 21, 2022
Lessee, Lease, Description [Line Items]
Lease term	3 years
Annual increase in lease payments (as a percent)	0.035
Total lease commitments | $	$ 700			$ 2,120
Operating leases, noncancelable term	2 years
Minimum lease term before option to terminate	2 years
Termination fee, monthly rent equivalent period	3 months
Deposit payable					£ 0
Soho, London, UK
Lessee, Lease, Description [Line Items]
Lease term		2 years
Second Soho London, UK Lease
Lessee, Lease, Description [Line Items]
Operating leases, noncancelable term		24 months
Operating lease, monthly payment		£ 130,000
Refundable lease deposit		£ 156,000
Denmark Hill, London, UK
Lessee, Lease, Description [Line Items]
Lease term						5 years
Annual lease payment			£ 180,000