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KEYNET RESPONSE
  • Home
  • Services
    • Security >
      • Security Officers & Mobile Security >
        • National Keyholding & Alarm Response >
          • How it works?
          • Process
          • Frequently Asked Questions
          • Why employ keyholders?
          • Keyholding Network
        • Local Security Services
        • Lock and Unlocks
        • Mobile Patrols
        • Security Officers
        • Events Staff
        • K9 Dog Handlers
      • Vacant Property Services >
        • Wireless Detection Systems
        • Vacant Property Inspections
        • Security Screens & Doors (Boarding)
        • Security Temporary Fencing
        • Barriers / Blocks
      • Security Systems >
        • Rapid Deployment Systems
        • CCTV Towers
        • Alarms and CCTV
        • Temporary Fire Systems
        • Gates & Barriers
        • Timelapse Video
    • Commercial Cleaning >
      • Commercial Cleaning Sectors
      • Specialist Commercial Cleaning Services
    • FM Facilities Management
  • Sectors
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    • Retail & Shopping Centres
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Critical National Infrastructure - CNI

​High Level Security and Hygiene Support for the UK's Essential Infrastructure

Critical National Infrastructure sites demand the highest levels of security, resilience and operational discipline. These environments — from utilities and energy to transport, data and government facilities — require enhanced protection, vetted personnel and reliable support services that meet strict regulatory standards.

Keynet provides integrated security and commercial cleaning solutions designed specifically for CNI environments, ensuring safe operations, controlled access and consistent compliance across high‑risk, high‑priority sites.

Our teams operate across live infrastructure, restricted zones, multi‑agency environments and sensitive operational areas where reliability and discretion are essential.

Security Services for CNI Sites
SIA‑Licensed, Vetted Security Officers
Our officers are vetted to enhanced standards and trained for high‑risk, regulated environments. They provide visible protection across entrances, control rooms, compounds, operational zones and perimeter areas.

Access Control & Identity Verification
We manage controlled entry points, ID checks, contractor verification, vehicle access, visitor management and movement around restricted areas — supporting compliance with site‑specific protocols.

Control Room & Monitoring Support
Keynet officers support control room operations, monitoring live feeds, alarms, access logs and incident alerts. They work alongside internal teams to maintain situational awareness and rapid response capability.

Perimeter & External Patrols
Regular patrols deter unauthorised access, suspicious activity and operational risks. Officers monitor fencing lines, compounds, substations, external buildings and vulnerable access points.

Incident Response & Escalation
Our teams follow strict escalation procedures aligned with CNI requirements, delivering rapid response to alarms, breaches, safety concerns and operational incidents.

Alarm Response & Keyholding
We provide 24/7 alarm response and secure keyholding, ensuring any activation is attended quickly and professionally, with full reporting for audit trails.

Technology‑Led Security for Critical Infrastructure
CCTV Towers
Rapid‑deploy CCTV Towers provide immediate coverage for compounds, substations, external perimeters, remote sites and temporary operational zones. They operate without mains power and deliver live monitoring, motion alerts and incident reporting.

PIDs (Perimeter Intrusion Detection Systems)
PIDs protect fencing lines, gates, compounds and external boundaries — identifying attempts to climb, breach or tamper with perimeter structures. Ideal for large or remote CNI sites.

Wireless Detection Systems
Wireless sensors secure internal corridors, plant rooms, control rooms, storage areas and restricted zones. They operate independently of building utilities, making them suitable for remote or unmanned sites.

Full Perimeter Detection
By combining CCTV Towers, PIDs and wireless sensors, Keynet creates a complete detection envelope around the site, ensuring early warning and rapid response to any intrusion.

Commercial Cleaning for CNI Environments
Technical Area Cleaning
We deliver specialist cleaning for control rooms, plant areas, equipment zones and operational spaces where precision and hygiene are essential.

Office & Welfare Facility Cleaning
We maintain offices, welfare areas, washrooms, kitchens and communal spaces with daily or scheduled cleaning routines aligned to operational requirements.

Deep Cleans & Scheduled Maintenance
We provide periodic deep cleans covering floors, fixtures, high‑touch surfaces, technical equipment surrounds and specialist operational zones.

External Area Cleaning & Waste Management
We support external hygiene, waste removal, vegetation control and compound tidiness to maintain safe and compliant environments.

Why CNI Clients Choose Keynet
  • Enhanced vetting and high‑risk environment training
  • Full integration of CCTV Towers, PIDs and wireless detection
  • Strong deterrence against intrusion, sabotage and unauthorised access
  • Proven support for regulated, multi‑agency and sensitive sites
  • Reliable cleaning routines aligned with operational schedules
  • Comprehensive reporting and audit‑ready documentation
  • Flexible deployment for remote, unmanned or multi‑site infrastructure

Typical CNI Environments We Support
  • Utilities (water, gas, electricity)
  • Energy generation and distribution
  • Telecommunications and data centres
  • Transport infrastructure
  • Government and public sector facilities
  • Fuel storage and distribution
  • Industrial plants and processing sites
  • Remote compounds and substations

​Contact us if you wish to know more about the services that we provide, or return back to sectors.

CORE SERVICES

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Security Officers & Mobile Security
SIA Licensed personnel deployed at a site, or in a mobile response security vehicle carrying out roaming duties
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Vacant Property Services
A range of services designed to protect vacant properties from vandalism, theft, fly tipping, and commercial squatters
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Wireless Systems
Perimeter detection systems, CCTV towers, temporary CCTV systems, and wireless alarms us to suit the site needs.
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    Contact Us

    ​*Please do not contact us for Security Officer jobs as we do not have any vacancies
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KEYNET T/A Keynet Response Limited. Registered Office: The Gables, Belton Road, Epworth, South Yorkshire, DN9 1JL.
Registered number: 13108504. Keynet Response Limited is registered in England. ​Tel: 01427 392555
  • Home
  • Services
    • Security >
      • Security Officers & Mobile Security >
        • National Keyholding & Alarm Response >
          • How it works?
          • Process
          • Frequently Asked Questions
          • Why employ keyholders?
          • Keyholding Network
        • Local Security Services
        • Lock and Unlocks
        • Mobile Patrols
        • Security Officers
        • Events Staff
        • K9 Dog Handlers
      • Vacant Property Services >
        • Wireless Detection Systems
        • Vacant Property Inspections
        • Security Screens & Doors (Boarding)
        • Security Temporary Fencing
        • Barriers / Blocks
      • Security Systems >
        • Rapid Deployment Systems
        • CCTV Towers
        • Alarms and CCTV
        • Temporary Fire Systems
        • Gates & Barriers
        • Timelapse Video
    • Commercial Cleaning >
      • Commercial Cleaning Sectors
      • Specialist Commercial Cleaning Services
    • FM Facilities Management
  • Sectors
    • Construction
    • Vacant Property Protection
    • Education
    • Hospitality, Leisure and Entertainment Venues
    • Stadiums, Arenas & Large Event Spaces
    • Logistics, Warehousing & Distribution
    • Critical National Infrastructure (CNI)
    • Retail & Shopping Centres
    • Corporate Offices & Commercial Buildings
    • Healthcare & Medical Facilities
  • Standards
    • Certifications
  • Get a Quote
  • Contact
    • Careers