The register
Underbelly Ltd is licensed to sponsor on Skilled Worker and Creative Worker. Its entry on the register dates back to at least 2026, and the organisation is based in London. Its rating on the register is Worker (A rating), Temporary Worker (A rating).
Companies House lists it as Underbelly Limited, number 04206540, incorporated 2001: 25 years of filings behind the name. Registered office: 4th Floor 36-38 Hatton Garden, London, EC1N 8EB, EC1N 8EB. Its filed activity puts it in arts, sport and leisure.
Holding a licence is the expensive, slow part done. For Underbelly Ltd the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.