The register
The register lists Sign Salad 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).
At Companies House the business is Sign Salad Ltd (company number 06042851), a private limited company incorporated in 2007, 19 years ago. The registered office is at 5 Sidmouth Road, London, NW2 5JY, NW2 5JY. By its SIC codes the business is in other services.
For a candidate this means one less obstacle: Sign Salad Ltd already has the licence most employers would have to apply for. The rest is the ordinary job of getting the interview.