The register
Colt Technology Services Group Limited, London, holds a Home Office sponsor licence covering 2 routes: Global Business Mobility: Senior or Specialist Worker and Skilled Worker. It has been on the register since at least 2026. The register records its rating as Worker (A rating).
Companies House lists it as Colt Technology Services Group Limited, number 03232904, incorporated 1996: 30 years of filings behind the name. Registered office: Colt House, 20 Great Eastern Street, London, EC2A 3EH, EC2A 3EH. By its SIC codes the business is in it, software and media. It has traded under other names before, including Colt Telecom Group Limited, Colt Telecom Group Public Limited Company.
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.