Sizewell C Nuclear Power Plant, Suffolk

The Sizewell C Nuclear Power Plant in Suffolk represents one of the UK’s largest energy infrastructure projects, designed to provide reliable low-carbon electricity for decades to come. With a vast construction footprint located close to the sea, the site required a secure perimeter solution that could withstand not only the operational demands of a large-scale infrastructure build but also the harsh marine environment.

The contractor needed

• A durable anti-climb fencing system to secure the perimeter
• A finish capable of resisting salt-laden coastal air, preventing rust and corrosion
• Products that conformed to British Standards and came with a guarantee of quality
• A supplier able to deliver large volumes on time to match a tightly scheduled build programme

The challenge was not just about security, but about providing a solution that could offer long-term durability in one of the most demanding environments.

The Solution

Alexandra Security was appointed to provide the fencing and gate package for the Sizewell C site. We supplied and supported the installation of:

• Over 3,000 metres of Protek 1000 V-Mesh Security Fencing, finished with a marine-grade powder coating to prevent corrosion
• 30 Security Gates, in both single and double-leaf configurations, all manufactured in the UK in our own workshops

Every product underwent rigorous quality checks prior to dispatch to guarantee defect-free delivery.

To ensure smooth progress on this critical project, our team coordinated just-in-time staggered deliveries direct to site, with offload support so the subcontractor could install efficiently. Throughout the process, we maintained constant communication with the contractor, ensuring that every deadline was met. With the contractor’s reputation tied to programme success, reliability and timeliness were paramount—and we delivered.

The Benefits

By working with Alexandra Security, the contractor gained:

• A perimeter system that combined security with long-term durability, tailored to the coastal environment
• Full compliance with British Standards, backed by our 15-year guarantee for peace of mind
• Efficient installation through phased deliveries and site offload support
• Reduced risk of delays, thanks to proactive communication and schedule alignment
• Confidence in a trusted UK manufacturer with the capability to deliver at scale

The Sizewell C project demonstrates Alexandra Security’s ability to supply large, complex, and environmentally challenging infrastructure projects with robust, British Standard-compliant perimeter solutions.

With in-house UK manufacturing, rigorous quality control, and proven delivery reliability, we are trusted by contractors on some of the most important infrastructure projects in the UK and beyond.

For more information or to discuss your upcoming project, contact our team today and discover how Alexandra Security can deliver secure, durable perimeter solutions at any scale.