HSE Site Inspections: What the Inspector Looks For

A white van pulls up outside the site gate. Someone in a hi-vis vest with an HSE lanyard gets out and asks for whoever's in charge. No phone call first, no email warning, no chance to tidy up the cabin or dig out the paperwork you've been meaning to update. That's an HSE inspection, and it's exactly how most of them start.

Construction sites get more HSE attention than almost any other type of workplace, and for good reason. It's one of the most dangerous industries to work in, and the regulator knows it. If you run a site, manage a crew, or work as a subcontractor, understanding what an inspector actually does when they arrive puts you in a much stronger position than hoping it never happens to you.

This guide walks through what triggers a visit, what an inspector will ask for, what they check first when they walk the site, and what they can do if they don't like what they find. None of it is complicated. Most of it comes down to having the right paperwork in the right place and running a site that matches what's written on paper.

When Can the HSE Inspect Your Site?

The short answer is: any time they want, without telling you first. The Health and Safety at Work etc. Act 1974 gives HSE inspectors extremely wide powers under section 20. An inspector can enter any workplace at any reasonable time without a warrant. They don't need your permission, and they don't need to book an appointment.

Once on site, section 20 lets an inspector do a lot more than just look around. They can take photographs and measurements, take samples of materials or substances, seize and make safe any equipment or substance that looks dangerous, question anyone on site (and require answers), and demand to see any document relevant to the investigation. Refusing to cooperate, or obstructing an inspector while they're doing any of this, is a criminal offence in its own right, separate from whatever else they might find on site.

Some visits are proactive. HSE runs targeted inspection campaigns focused on specific risks, refurbishment work, work at height, or particular regions and trades where their data shows a pattern of poor practice. Other visits are reactive: triggered by a RIDDOR report, a complaint from a member of the public or a worker, or a tip-off from another agency like the local authority or the fire service. A small number are follow-ups, where an inspector comes back to check that an improvement notice has actually been dealt with.

Because you generally won't know which of these is happening, or when, the only sensible approach is to run the site as if an inspector could walk through the gate today. That's not paranoia, it's just how the system is designed to work. Advance warning would defeat the point of an inspection.

What Documents Will an Inspector Ask For?

Once an inspector is satisfied the site looks reasonably under control, or sometimes before they've even walked the plot, they'll ask for paperwork. This is where a lot of sites come unstuck, not because the work itself is unsafe, but because the evidence that it's being managed properly isn't where it needs to be.

An inspector isn't after a filing cabinet full of generic templates. They want to see documents that match the job actually happening in front of them. A risk assessment for "general construction work" doesn't cut much ice if the crew are cutting into an asbestos-containing ceiling tile ten feet away. Our guide on how to write RAMS for construction work covers what makes a document specific enough to hold up under this kind of scrutiny.

Training records get checked against the people actually on site that day, not just against a list of names in a folder. If your CSCS cards, plant tickets, or asbestos awareness certificates are for people who left the job six months ago, that's a gap an inspector will spot fast. The accident book and any RIDDOR submissions get compared against what's actually happened on site, so if there's a mismatch between an injury you know about and a record that doesn't exist, expect questions.

What Do HSE Inspectors Check First?

Before they even ask for a single document, most inspectors will walk the site. This visual check tells them a lot about how seriously health and safety is taken day to day, and it shapes how the rest of the visit goes. A site that looks under control on a walk-round tends to get an easier ride on the paperwork side too, because the inspector already has some confidence the systems are real.

Work at height gets attention first because falls from height are consistently the single biggest cause of fatal injury in construction. An inspector will look at scaffold tags, edge protection, ladder condition and use, and whether anyone's taking shortcuts near an open edge or a fragile roof. If you want the detail on why this area gets so much focus, our piece on fragile roofs is worth a read.

PPE is checked for actual use, not just presence. A hard hat clipped to a belt loop or safety glasses pushed up on a forehead doesn't count as PPE being worn. Inspectors have seen every excuse for why the kit isn't on properly, and it rarely buys any goodwill. Housekeeping, trailing cables, offcuts left where people walk, materials stacked unsafely, gets noticed too, because a messy site is often a sign that other things are being let slide as well.

What Can an Inspector Issue?

If an inspector finds something wrong, what happens next depends on how serious it is. HSE works on a graduated scale, and most first-time or minor issues don't end in a notice at all, let alone a court date.

Verbal or written advice is the most common outcome. It's not a legal notice, it's the inspector telling you what needs to change and expecting you to sort it. Most first visits end here, especially where the issue is minor and gets fixed on the spot.

An improvement notice steps things up. It's a formal legal document that names the specific breach, refers to the regulation you've broken, and gives you 21 days to fix it. Ignoring an improvement notice, or not fixing the problem properly within the deadline, is itself an offence and tends to lead to much harsher enforcement next time round.

A prohibition notice is the serious one. It stops a specific activity immediately, sometimes before the inspector has even left site, because they judge there's a risk of serious personal injury. Unlike an improvement notice, there's no 21-day grace period. The work stays stopped until whatever caused the risk has been dealt with and the notice is formally lifted.

Prosecution is reserved for the most serious cases: repeated breaches, wilful disregard for known risks, or where someone has been killed or seriously injured. Since 2015, sentencing guidelines allow unlimited fines in the Crown Court, scaled to the size and turnover of the business, and individuals, including directors and self-employed contractors, can face up to two years in prison for the most serious offences.

Fee for Intervention sits alongside all of this. If an inspector identifies what HSE calls a "material breach," meaning a genuine contravention of health and safety law serious enough to require them to write to you about it or take further action, you get billed £60 an hour for their time. That covers the site visit, the write-up, any follow-up calls, and the notice itself. It's not a fine, it's a cost-recovery charge, and it applies whether or not you agree with their findings.

Improvement and prohibition notices go on HSE's public register and stay visible for six months. A conviction stays on the public register permanently. Both are the kind of thing a main contractor or client checks before awarding work, so the reputational cost often outlasts the legal one.

Your Rights During an Inspection

The powers under section 20 are one-sided in the inspector's favour, but you're not without rights during a visit. You can ask to see the inspector's identification before letting them proceed, and you're entitled to know why they're there. You can have someone accompany the inspector around the site, and it's worth making sure that person is someone competent who knows the job, not whoever happens to be nearest the gate when the van pulls up.

You're entitled to a copy of any notice served on you, and you have the right to appeal an improvement or prohibition notice to an employment tribunal within 21 days of it being issued. An appeal against an improvement notice suspends it until the tribunal decides. An appeal against a prohibition notice does not suspend it, the activity stays stopped regardless of the appeal, because the risk it addresses is judged too serious to leave unresolved in the meantime.

What you can't do is refuse entry, refuse to answer questions, or get in the way of the inspection. Obstruction is a specific criminal offence under HSWA, separate from anything else found on site, and it tends to make an inspector far less sympathetic about everything else they find.

How to Stay Inspection-Ready Every Day

The sites that come through an HSE visit cleanly aren't the ones that scramble to prepare when they see the van. They're the ones where the day-to-day habits already match what an inspector expects to see. A handful of recurring mistakes account for most of the problems that turn a routine visit into a formal notice.

Paperwork sitting in a cabin three hundred metres from the actual job isn't much use to an inspector standing next to a live task, and it doesn't look great either. Keep copies of the relevant RAMS with the team doing the work, whether that's a folder in the van, a laminated copy on site, or a digital copy on a phone or tablet that someone can actually pull up on the spot.

Generic risk assessments are one of the most common findings in enforcement reports. A document that was written once and photocopied for every job since doesn't reflect the ground conditions, the specific plant on site, or the actual sequence of work happening today. Our step-by-step risk assessment guide covers how to write something that's actually specific to the job rather than a box-ticking exercise.

If nobody on site knows enough to talk the inspector through what's happening and why, that's a red flag in itself, regardless of whether the work is actually being done safely. Make sure whoever's running the site day to day understands the RAMS, not just the person who wrote them.

And if you don't know the answer to a question, say so. Inspectors would rather hear "I'm not sure, let me check and get back to you" than a guess that turns out to be wrong. Guessing badly on a factual question, like when a piece of kit was last inspected, can look a lot worse than admitting you need to check the record.