The register
The register lists RSR CO. LTD in Surrey, Surrey 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).
At Companies House the business is RSR CO. LTD (company number 10295726), a private limited company incorporated in 2016, 10 years ago. Registered office: Pegasus Court 27 Herschel Street, Slough, SL1 1PA, SL1 1PA. Its filed activity puts it in other services.
What the licence tells a candidate is that the door is not locked. Whether it is open this month is a question for RSR CO. LTD's own careers page and the job boards, and the answer changes with the season and the order book.