The register
The register lists Elwin Street Ltd 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).
Companies House lists it as Elwin Street Ltd, number 04174562, incorporated 2001: 25 years of filings behind the name. The registered office is at 10 Elwin Street, London, Greater London, E2 7BU, E2 7BU. Its filed activity puts it in it, software and media.
Holding a licence is the expensive, slow part done. For Elwin Street Ltd the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.