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| Company name | Primary business area | Primary coverage | |
|---|---|---|---|
| Arena International | Integrated security | United Kingdom (UK) | |
| Gallagher Security | Integrated security | Global | |
| Genetec Inc. | IP networking products | United States of America (USA) | |
| Messe Frankfurt | Access control | Germany | |
| Telexper International Inc. | CCTV | Global | |
| The Hemming Group Ltd. | Physical security | United Kingdom (UK) | |
| 4Site Online Ltd. | Integrated security | Western Europe | |
| AAC Mechanical & Electrical | CCTV | United Kingdom (UK) | |
| AB Security | CCTV | United Kingdom (UK) | |
| AB Security and Fire | Intruder alarm | United Kingdom (UK) | |
| Able Security Concepts Ltd | Manned guarding | United Kingdom (UK) | |
| Access Buzzers | Door interface/controls | United Kingdom (UK) | |
| Access Direct | Access control | United Kingdom (UK) | |
| Access Fire And Security North West | Intruder alarm | United Kingdom (UK) | |
| ACCTIV8 | Intruder alarm | United Kingdom (UK) | |
| ACS / Yoursecurityuk | Intercom systems | United Kingdom (UK) | |
| Active Security | Intruder alarm | United Kingdom (UK) | |
| ADB Alarms Ltd | Intruder alarm | United Kingdom (UK) | |
| ADi security and surveillance | CCTV | United Kingdom (UK) | |
| ADK Security Ltd | CCTV | United Kingdom (UK) | |
| Advance Integrated Systems PLC | Access control | United Kingdom (UK) | |
| Advance Peripheral Systems Ltd | Intruder alarm | United Kingdom (UK) | |
| Advanced Access Ltd | Access control | United Kingdom (UK) | |
| Advanced Security Developments | CCTV | United Kingdom (UK) | |
| Aegis Security Solutions & Technolgies Ltd. | Intrusion detection | United Kingdom (UK) | |
| AES Distribution (NI) Ltd | Intercom systems | United Kingdom (UK) | |
| AES Distribution (NI) Ltd. | Intercom systems | Ireland | |
| Alink Ltd (Security Installers) | Integrated security | United Kingdom (UK) | |
| Alpha Integrated Systems Ltd | CCTV | United Kingdom (UK) | |
| Alpine Security (UK) Ltd | Intruder alarm | United Kingdom (UK) | |



