The register
The register lists Astra (GB) Limited 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).
At Companies House the business is Astra (GB) Limited (company number 02200253), a private limited company incorporated in 1987, 38 years ago. The registered office is at 3rd Floor 86 - 90 Paul Street, London, EC2A 4NE, EC2A 4NE. Its filed activity puts it in business services. It has traded under other names before, including Astra Marketing Limited, Entertainment From the Stars Limited.
Holding a licence is the expensive, slow part done. For Astra (GB) Limited the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.