The register
The register lists ETC Ltd in Kilmarnock, East Ayrshire 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 ETC LTD (company number 14897176), a private limited company incorporated in 2023, 3 years ago. The registered office is at 12 Wheatsheaf Way, Cambridge, CB25 9GG, CB25 9GG.
Holding a licence is the expensive, slow part done. For ETC Ltd the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.