The register
The register lists The Diffley Partnership Limited in Edinburgh 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).
Companies House lists it as The Diffley Partnership Limited, number SC562642, incorporated 2017: 9 years of filings behind the name. The registered office is at 2nd Floor, Prospect House, 5 Thistle Street, Edinburgh, EH2 1DF, EH2 1DF. By its SIC codes the business is in professional and technical services. It has traded under other names before, including Mark Diffley Consultancy and Research 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.