The register
The register lists ChemTrust in London as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. The register records its rating as Worker (A rating).
Companies House lists it as Chem Trust, number 05933897, incorporated 2006: 20 years of filings behind the name. The registered office is at Impact Hub Euston, 1 Triton Square, London, NW1 3DX, NW1 3DX. Its filed activity puts it in education.
Holding a licence is the expensive, slow part done. For ChemTrust the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.