The register
The Energy Saving Trust Limited, London, holds a Home Office sponsor licence on the Skilled Worker route, and has been on the register since at least 2026. Its rating on the register is Worker (A rating).
Companies House lists it as The Energy Saving Trust Limited, number 02622374, incorporated 1991: 35 years of filings behind the name. Registered office: 223-231 Pentonville Road, London, N1 9NG, N1 9NG. By its SIC codes the business is in professional and technical services. It has traded under other names before, including Solidtry Limited.
Holding a licence is the expensive, slow part done. For The Energy Saving Trust Limited the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.