The register
The register lists Rensair Limited in London as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Rating on the current register: Worker (A rating).
At Companies House the business is Rensair Limited (company number 12749725), a private limited company incorporated in 2020, 6 years ago. Registered office: Third Floor, 20 Old Bailey, London, EC4M 7AN, EC4M 7AN. Its filed activity puts it in manufacturing and engineering.
Holding a licence is the expensive, slow part done. For Rensair Limited the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.