The register
The register lists B.t. Batsford 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 B.T. Batsford Limited (company number 03422618), a private limited company incorporated in 1997, 29 years ago. Registered office: 43 Great Ormond Street, London, WC1N 3HZ, WC1N 3HZ. By its SIC codes the business is in it, software and media. It has traded under other names before, including Salamander Books Limited, Senate Books 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.