The register
The register lists B & N Building Ltd in London as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Its rating on the register is Worker (A rating).
Companies House lists it as B & N Building Ltd, number 10613850, incorporated 2017: 9 years of filings behind the name. Registered office: 161 Forest Road, London, E17 6HE, E17 6HE. By its SIC codes the business is in business services.
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.