The register
The register lists Zamzam in Bolton as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Rating on the current register: Worker (A rating).
Companies House lists it as Zamzam Ltd, number 06919422, incorporated 2009: 17 years of filings behind the name. The registered office is at 20 North Audley Street, Mayfair, London, W1K 6WE, W1K 6WE. By its SIC codes the business is in retail.
For a candidate this means one less obstacle: Zamzam already has the licence most employers would have to apply for. The rest is the ordinary job of getting the interview.