1.3 Million Safe Working Hours Achieved at London 4

Data Centres17 Apr 2026

Health & Safety in the Data Centre Landscape

In the data centre industry, where projects are defined by scale, complexity, and precision, maintaining the highest standards of health and safety (H&S) is not just a regulatory requirement, but a core pillar of responsible development. As demand for digital infrastructure continues to accelerate, construction environments are becoming increasingly sophisticated, integrating advanced electrical systems, heavy mechanical equipment, and multi‑contractor workflows. In this landscape, a strong safety culture is essential to protecting people, ensuring operational excellence, and delivering facilities that meet the reliability expectations of our customers.

Therefore, we’re proud to share a significant milestone achieved on the development of our London 4 Data Centre. It represents not only the dedication of our project teams and partners, but also our commitment to building world‑class facilities without compromising on the wellbeing of those who are helping to bring the first phase of this facility online.

Achieving 1.3 Million Safe Working Hours at London 4

We’re delighted to announce that, together with our project teams and partners, we have successfully achieved 1.3 million safe working hours during the development of our London 4 Data Centre. This milestone reflects months of disciplined execution, consistent collaboration, and an unwavering commitment to maintaining a safe environment across every stage of construction.

Reaching 1.3 million safe working hours means that thousands of individual tasks, from heavy‑lift operations and complex electrical installation to day‑to‑day site activities, have been carried out without a single incident resulting in lost time. It’s a clear demonstration of the strong safety culture embedded within the project, and of the dedication shown by every person on site to prioritise wellbeing, follow best‑practice procedures, and take collective responsibility for one another.

“This achievement represents the trust, professionalism, and vigilance that enable us to deliver high‑performance digital infrastructure without compromising the safety of our teams”.

Joe Purslow, Head of Health, Safety and Environment - UK and Europe.

How this Safety Milestone has been achieved

This milestone has been achieved through the effective implementation, management, and continuous monitoring of robust H&S controls across the site, including:

Precise works planning, clear communication and successful coordination of various trades.
Comprehensive electrical safety standards, QA & commissioning procedures.
HSE leadership from all project team members.
‘Golden hour’ inspections completed by all senior management and ‘boots on the ground’ approach to HSE.
Consulting and engaging operatives regarding HSE matters; promoting a philosophy of coaching and education.
Stakeholder collaboration, and all project team members sharing their expertise to prevent any lost time incidents.
Behavioural safety initiatives recognising and rewarding good practice.
Comprehensive H&S inductions for all site personnel.
Managers’ Safety Forums engaging stakeholders in H&S decision-making.
Regular H&S audits and site safety walks with multi-disciplinary teams.
Approved method statements, risk assessments, and dynamic Safe Plan Actions (SPAs) for all activities.
Activity briefings coordinating all trades and highlighting Environmental, Health and Safety (EHS) risks.
Permit-to-work systems for high-risk activities.
Safety Observation Reporting (SOR) via the “You Say, We Did” platform.
Plant and equipment inspection regimes, including LOLER and daily checks.

1.3 Million Safe Working Hours Achieved at London 4 Data Centre | Colt DCS

We are proud to celebrate achieving 1.3 million safe working hours during the construction of our London 4 data centre.

Why this Milestone Matters

Achieving 1.3 million safe working hours sets an important benchmark for what is possible in large‑scale data centre development. As facilities grow in size, complexity, speed of delivery, and maintaining an incident‑free environment becomes increasingly challenging. Demonstrating that such progress can be achieved without compromising safety reinforces the message that high‑performance digital infrastructure and rigorous H&S standards can go hand in hand. This strengthens industry expectations around risk management, contractor accountability, and the adoption of robust safety cultures across every phase of construction.

For Colt DCS, this milestone is a clear reflection of our commitment to building responsibly. It highlights the strength of our operational practices, the professionalism of our construction partners, and the culture of care embedded across our projects. Safe delivery is not only a regulatory requirement, it’s a core part of how we protect our people, ensure project continuity, and uphold the trust our customers place in us to deliver resilient, world‑class facilities. This achievement reinforces our position as a data centre operator that prioritises safety as much as performance, and it sets a strong foundation for the continued growth of our portfolio.

Looking Ahead

The achievement of 1.3 million safe working hours marks a significant milestone for Phase 1 of our London 4 Data Centre development. With three further phases planned before the facility becomes fully operational, maintaining and continuously improving our H&S standards will remain a critical focus throughout the programme.

By carrying these standards forward across all four phases, we aim not only to deliver a fully operational, world‑class data centre, but to do so in a way that consistently protects our people and sets a lasting example for safe, responsible development in the sector.