The register
The register lists Birmingham Opera Company in Birmingham, West Midlands as a licensed sponsor on Creative Worker, an entry that goes back to at least 2026. Its rating on the register is Temporary Worker (A rating).
Companies House lists it as Birmingham Opera Company, number 01850467, incorporated 1984: 42 years of filings behind the name. The registered office is at 205 The Argent Centre, 60 Frederick Street, Birmingham, B1 3HS, B1 3HS. By its SIC codes the business is in arts, sport and leisure. It has traded under other names before, including City of Birmingham Touring Opera, Cambridge Opera Group Limited.
A licence says an organisation may sponsor; it does not say it is hiring today. The way to find out is the same as for any employer: the careers page, the job boards, and a direct approach with a UK-style CV that says early that sponsorship would be needed.