The register
The register lists Roundhouse Design Ltd in London as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Its rating on the register is Worker (A rating).
Roundhouse Design Limited is the registered name (Companies House number 03207868), a private limited company on the register since 1996. The registered office is at 11 Wigmore Street, London, W1U 1PE, W1U 1PE. By its SIC codes the business is in retail.
Holding a licence is the expensive, slow part done. For Roundhouse Design Ltd the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.