The register
The register lists Hydrogen Building & Maintenance 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).
Hydrogen Building & Maintenance Ltd is the registered name (Companies House number 12783685), a private limited company on the register since 2020. Registered office: Office 1742 321-323 High Road, Chadwell Heath, Essex, RM6 6AX, RM6 6AX. Its filed activity puts it in construction.
Holding a licence is the expensive, slow part done. For Hydrogen Building & Maintenance Ltd the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.