The register
The register lists Essentra plc in Milton Keynes as a licensed sponsor on Global Business Mobility: Senior or Specialist Worker and Global Business Mobility: Graduate Trainee and Skilled Worker, 3 routes in all, and has done since at least 2026. The register records its rating as Worker (A rating), Temporary Worker (A rating).
Companies House lists it as Essentra PLC, number 05444653, incorporated 2005: 21 years of filings behind the name. The registered office is at Langford Locks, Kidlington, Oxford, OX5 1HX, OX5 1HX. Its filed activity puts it in professional and technical services. It has traded under other names before, including Filtrona PLC.
Holding a licence is the expensive, slow part done. For Essentra plc the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.