The register
The Carbon Trust, 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).
At Companies House the business is The Carbon Trust (company number 04190230), a company limited by guarantee incorporated in 2001, 25 years ago. Registered office: Level 5, Arbor, 255 Blackfriars Road, London, SE1 9AX, SE1 9AX. Its filed activity puts it in professional and technical services.
What the licence tells a candidate is that the door is not locked. Whether it is open this month is a question for The Carbon Trust's own careers page and the job boards, and the answer changes with the season and the order book.