The register
The register lists Guthrie Castle Ltd in By Forfar, Angus 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 Guthrie Castle Limited (company number 03196600), a private limited company incorporated in 1996, 30 years ago. Registered office: 1 Blossom Yard, Fourth Floor, London, E1 6RS, E1 6RS. Its filed activity puts it in professional and technical services. It has traded under other names before, including Dsp Seminars Limited, Rbco 206 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.