The register
The register lists Mammoth Screen Limited in London as a licensed sponsor on Creative Worker, an entry that goes back to at least 2026. The register records its rating as Temporary Worker (A rating).
Mammoth Screen Ltd is the registered name (Companies House number 05976348), a private limited company on the register since 2006. Registered office: Itv White City, 201 Wood Lane, London, W12 7RU, W12 7RU. Its filed activity puts it in business 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.