The Office for Nuclear Regulation (ONR) has taken firm action. Specifically, they have issued fire enforcement notices to five large companies. These firms work together in the Mechanical, Electrical, and Heating (MEH) alliance at Hinkley Point C. In December 2025, inspectors found “significant” safety gaps at the site. Consequently, this news is a big deal for the UK construction industry. It shows that even the biggest projects must follow the law. Therefore, we must look at why these failures happened.
The Background of the Hinkley Point C Project
Hinkley Point C is a massive project in Somerset. It is the first new nuclear plant in the UK for a long time. Because it is so large, safety is a huge job. Many different firms work there at once. However, having many workers can make safety harder to manage. The MEH alliance was formed to help these firms work better together. Unfortunately, the recent inspection shows that gaps still exist. Specifically, the fire safety rules were not being met in certain buildings.
What Happened During the Inspection?

Inspectors visited the site late last year. First, they looked closely at the Unit 1 HF electrical building. What they found was quite worrying. There were three main areas where the firms failed. For example, they did not have a proper fire risk plan. Additionally, there were not enough ways to get out in an emergency. Furthermore, they found piles of waste blocking the stairs. Because stairs are vital for escape, this was a major risk. Consequently, the ONR had to step in.
Why the ONR Chose Fire Enforcement
The regulator does not hand out notices lightly. Instead, they use fire enforcement when there is a real risk of harm. Mahtab Khan is a top official at the ONR. He said that safety is a legal duty, not a choice. Therefore, the goal of these notices is to protect the workers. While no one was hurt this time, the risk of serious injury was too high to ignore. In addition, the law says every worker must have a safe way to leave a building during a fire.
The Five Companies Named in the Fire Enforcement Action
The notices were sent to five specific firms. These are Altrad Babcock Ltd, Altrad Services Ltd, and Balfour Beatty Kilpatrick Ltd. The others are Cavendish Nuclear and NG Bailey Ltd. Consequently, these companies must now fix the issues quickly. If they do not, they could face even tougher legal action. In contrast, most sites of this size usually have stricter controls. However, the scale of this project may have caused some people to lose focus on the basics.
Understanding the Fire Enforcement Process
When a notice is issued, it is a formal warning. It means the law has been broken. Specifically, the firms must change how they work. They have a set amount of time to make things right. If they fail, they could be taken to court. Therefore, fire enforcement is a very serious tool for the ONR. It ensures that safety is not just a box to tick. Instead, it must be a daily habit for every person on site.
The Dangers of Combustible Materials

One of the biggest issues was waste on the stairs. On a construction site, many things can catch fire. For example, wood, plastic, and cables are everywhere. If these items sit in a staircase, they block the exit. Additionally, they provide fuel for a fire. Consequently, a small fire could turn into a huge disaster very quickly. This is why housekeeping is so important. However, it seems the MEH alliance let these standards slip during a busy period.
Improving the Means of Escape
A “means of escape” is simply a safe way out. In a large building, you need more than one way to leave. This is because a fire might block one path. During the inspection, there were not enough exits for the number of people inside. Therefore, the firms must now add more doors or limit how many people go inside. Furthermore, every exit must be clearly marked. If workers do not know where to go, they will panic.
Immediate Results of the Fire Enforcement Action
The companies are now working hard to fix their mistakes. For instance, they must update their risk plans. They also need to clear all exit routes immediately. Keeping stairs free of rubbish is a basic rule. However, on a busy site, these basics are often missed. As a result, the MEH alliance must prove they can keep their staff safe every single day. The ONR will likely return soon to check on their progress.
Why Risk Assessments are Vital

A fire risk assessment is a document. It lists what could start a fire and who might be hurt. Additionally, it explains how to stop a fire from happening. Without this document, safety is just guesswork. Consequently, the ONR was very concerned that a proper plan was missing. To fix this, the firms must hire experts to look at every room. Then, they must write down exactly how they will keep people safe.
Fire Safety is a Top Priority for All
Building a nuclear power station is a huge task. It costs billions of pounds. But money and speed should never come before lives. This case shows that the ONR is watching closely. Therefore, they will step in whenever they see a danger. This keeps the industry honest and the workers safe. Every firm at Hinkley Point C now knows that they must do better.
Lessons and Future Fire Enforcement Prevention
Every safety manager in the UK should take note. If it can happen at Hinkley Point C, it can happen anywhere. Specifically, check your fire exits today. Make sure your risk assessments are up to date. Do not wait for an inspector to find a fault. In conclusion, being proactive is the only way to avoid legal trouble. Safety is a journey, not a destination.
Moving Forward After the Inspection
Hinkley Point C is still a vital project for the UK. It will provide clean energy for millions of homes. But it must be built safely. Consequently, the fire enforcement notices are a helpful wake-up call. They allow the firms to fix problems before an accident happens. In the end, a safer site is a more productive site. We expect to see much higher standards in the coming months.
Career Opportunity: Building Safety Manager (Sanctuary)
Do you care about keeping people safe? Specifically, Sanctuary is hiring a Building Safety Manager in East London.
In this role, you will lead safety efforts for residential buildings. Therefore, you will make sure every home meets the highest standards. It is a full-time job with a great salary of £62,919 – £66,231. Because you have the right skills, this is a perfect chance to grow your career. You will help prevent the same kinds of risks seen at major construction sites.
Apply for the Building Safety Manager role at Sanctuary here.