The register
The register lists At&t Istel in London as a licensed sponsor on Global Business Mobility: Senior or Specialist Worker and Skilled Worker, 2 routes in all, and has done since at least 2026. The register records its rating as Worker (A rating).
At Companies House the business is At&T Istel (company number 03531467), a private unlimited company incorporated in 1998, 28 years ago. The registered office is at Studley Point, Birmingham Road, Studley, Warwickshire, B80 7AS, B80 7AS. By its SIC codes the business is in it, software and media. It has traded under other names before, including Ingleby (1082) Limited.
For a candidate this means one less obstacle: At&t Istel already has the licence most employers would have to apply for. The rest is the ordinary job of getting the interview.