The register
Isun- Immigration Support Network Ltd, London, Haringey, holds a Home Office sponsor licence covering 2 routes: Skilled Worker and Global Business Mobility: Senior or Specialist Worker. It has been on the register since at least 2026. Its rating on the register is Worker (A rating).
Companies House lists it as Isun - Immigration Support Network Ltd, number 14902491, incorporated 2023: 3 years of filings behind the name. Registered office: Flat 54 Robert Burns House, Northumberland Park, London, N17 0RB, N17 0RB. By its SIC codes the business is in professional and technical services.
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.