The register
The register lists 21D Clinical Limited in Warrington 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 21D Clinical Limited, number 09476584, incorporated 2015: 11 years of filings behind the name. The registered office is at Unit 602 Birchwood One Business Park Dewhurst Road, Warrington, Birchwood, WA3 7GB, WA3 7GB. By its SIC codes the business is in health care. It has traded under other names before, including Twelve Trees Dental 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.