The UK Has Kept Its Asbestos Control Limit — But What Does That Actually Mean?

There has been renewed discussion around asbestos exposure limits across Europe and the UK.

In May 2026, the Health and Safety Executive (HSE) published the findings of its review into Great Britain's workplace asbestos control limit.

The conclusion?

The current UK control limit of 0.1 fibres per millilitre of air (f/ml), measured as a four-hour time-weighted average, will remain in place.

But that doesn't mean businesses can simply work up to that limit.

In fact, the HSE's review reinforces an important message: the control limit is not a target.

What Is the Asbestos Control Limit?

The control limit is a legal occupational exposure limit used when assessing airborne asbestos exposure during work activities.

In Great Britain, it remains at:

0.1 fibres per millilitre of air (f/ml) over a four-hour time-weighted average.

The limit applies to workplace exposure and forms part of the regulatory framework surrounding asbestos work.

However, asbestos work should still be planned and controlled so that exposure is reduced as far as reasonably practicable.

That distinction is important.

The Control Limit Is Not a Safe Level to Aim For

A common misunderstanding is that if exposure remains below the legal control limit, everything is automatically acceptable.

That isn't how asbestos management works.

The HSE's position is that effective control measures should minimise exposure, and its 2026 review found that most asbestos work, when requirements are followed, is already designed to reduce exposure well below the control limit.

The objective should therefore never be:

"How close can we get to the limit?"

It should be:

"How effectively can we prevent exposure in the first place?"

Why Has the UK Decided Not to Lower the Limit?

The HSE's review considered international scientific, technical and workplace evidence, including the European Union's decision to reduce its occupational exposure limit for asbestos.

After reviewing the evidence, the HSE concluded that there was not currently clear evidence that lowering Great Britain's legal control limit would reduce current or future exposures or improve health outcomes.

It also identified practical difficulties in measuring asbestos concentrations at lower levels.

The HSE concluded that other factors, including training, competence, site discipline and regulatory enforcement, have a greater influence on reducing asbestos exposure when work is carried out correctly.

So What Matters Most?

The decision puts the spotlight back onto something that can sometimes get lost in discussions about numbers and regulations: how asbestos work is actually carried out.

Good asbestos control relies on multiple layers of protection, including:

Proper Identification

Before work begins, asbestos-containing materials need to be identified appropriately.

Competent People

Anyone carrying out asbestos-related work needs the appropriate training, competence and controls for the work involved.

Effective Planning

Work should be properly assessed and planned before materials are disturbed.

Engineering Controls

Appropriate control measures and equipment should be used to prevent asbestos fibres becoming airborne and spreading.

Site Discipline

Procedures need to be followed consistently, not just written down in a risk assessment and forgotten.

Monitoring and Verification

Where required, air monitoring and clearance procedures provide additional assurance that controls have worked effectively.

Why This Matters to Building Owners

You don't necessarily have to be carrying out asbestos removal yourself for this to matter.

Building owners, landlords, facilities managers and businesses all have a role to play in preventing exposure.

Poor planning can result in contractors disturbing asbestos unexpectedly.

Incomplete asbestos information can mean workers don't know what they're dealing with.

And inadequate management can turn what should have been a controlled maintenance task into an asbestos incident.

The HSE's 2026 inspection campaign highlighted similar concerns, identifying inadequate management plans, training and procedures for work liable to disturb asbestos as common areas for improvement.

What Does This Mean for Businesses?

The message from the HSE is not that asbestos has become less dangerous.

It is that effective control depends on how well the risks are managed.

Businesses should therefore focus on the fundamentals:

• Know where asbestos is located.

• Keep asbestos information up to date.

• Make sure contractors have access to relevant information.

• Use appropriate surveys before intrusive work.

• Ensure workers have the correct training.

• Use competent asbestos professionals.

• Plan removal and maintenance work properly.

• Never rely on the control limit as a target.

A Changing Industry, But the Same Priority

Asbestos regulation continues to evolve.

The HSE is reviewing the wider Control of Asbestos Regulations 2012, while international approaches to exposure limits continue to develop.

But the fundamental priority remains unchanged:

Prevent people from being exposed to asbestos fibres.

For businesses, that means good asbestos management starts long before someone enters an enclosure or begins removing material.

It starts with knowing what is in the building.

How ICEASBESTOS Can Help

ICEASBESTOS provides nationwide asbestos surveying, testing, management and licensed removal services for domestic and commercial properties.

Whether you're planning refurbishment, managing an existing building or dealing with an unexpected asbestos discovery, our specialist team can help you understand the risk and take the appropriate next step.

Don't wait until asbestos becomes a problem.

Contact ICEASBESTOS today for professional advice, surveying and removal services across the UK.