Anti-Ligature: A Complete Guide for Healthcare, Custody and Education

Anti-ligature design is one of the most important ways to keep people safe in mental health wards, prisons, police custody and specialist schools. It is also one of the most misunderstood. There is no British Standard that defines it, guidance is spread across several bodies, and product claims vary widely.

This guide brings it together: what anti-ligature means, where ligature risk is found, the guidance that applies, how to manage the risk, and what to look for when you specify products. Each section links to a more detailed guide.

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What Does Anti-Ligature Mean?

A ligature is anything that could be used to bind or tie, such as a cord, belt, sheet or item of clothing. A ligature point is a fixed feature that a ligature could be attached to and that could bear weight, wholly or partly. Door handles, hinges, window frames, curtain rails, exposed pipework, radiators and ventilation grilles can all be ligature points.

An anti-ligature product is designed to reduce the opportunities to attach a ligature. It does this through its shape, how it is fixed and the materials it is made from. No product can remove risk entirely, which is why you will see responsible suppliers describe their products as anti-ligature or ligature-resistant, never ligature-proof.

Anti-ligature is also different from low surface temperature (LST). LST products keep touchable surfaces cool enough to prevent burns. Many settings need both, so check each separately. Our guide to anti-ligature vs LST radiators explains the difference.

Why It Matters

The built environment is one of the few parts of suicide prevention that designers, estates teams and specifiers directly control. The figures show why it matters.

• Mental health services. The National Confidential Inquiry into Suicide and Safety in Mental Health (NCISH) reports that deaths by hanging or strangulation among people in contact with mental health services rose by 16% between 2013 and 2023.
• On the ward. Of inpatient deaths on wards between 2013 and 2023, 91% involved hanging, strangulation or asphyxia.
• Low-lying points. Where information was available, 92% of on-ward hanging deaths between 2011 and 2021 involved a low-lying ligature point. Risk is not just at ceiling height.
• Custody. There were 71 self-inflicted deaths in prisons in England and Wales in the 12 months to June 2026.

Every one of these figures represents a person, a family and the staff who cared for them. Good design can't prevent every death, but it can remove opportunities and buy staff time to intervene.

Where Ligature Risk Is Found

Ligature risk looks different in each setting. These guides cover the detail.

Regulations and Guidance

There is no single anti-ligature standard. Instead, a mix of law, guidance and test methods applies. The CQC itself notes there is no standardised approach to assessing ligature risk, so organisations set their own policies within this framework.

Because no standard defines anti-ligature, always ask suppliers what they tested, how, and what the results were.

Managing Ligature Risk

A widely used approach sets a simple order of priority:

1. Remove the ligature point where you can.
2. Replace it with a safer alternative.
3. Protect what has to stay, for example with an anti-ligature guard or cover.
4. Manage the risk that remains through observation, care planning and staff training.

This sits within a wider process. Keep a ligature risk register, reviewed at least annually and after any incident or change to the building. Audit installed products to check fixings and clearances are still as specified; even a small gap between a radiator guard and the wall can create a new risk, as our guide to open-ended shoulders explains. Involve clinical staff, estates and patients' representatives in decisions.

Not every ligature point should go. A grab rail can be a ligature point, but removing it may cause falls. The aim is the right balance of risks for the people using each space.

What to Look For in Anti-Ligature Products

Whatever the product, the same principles apply.

• No anchor points. Smooth, continuous surfaces with no gaps, ledges or openings to tie anything to, including where the product meets the wall or floor (how to close the gap).
• Small-hole grilles. Where air or heat must pass through, a pattern such as 2mm holes at 4mm centres, tested to exceed IP3X. Where that pattern comes from.
• Rounded corners and sloping tops. Fewer edges to grip or injure, and nothing to climb or stand on.
• Hidden fixings and security locks. No exposed screws; access for authorised staff only, for example with Contour Secure cam locks.
• Strength. Steel such as 1.5mm or 2mm Zintec, or Magnelis in wet areas, so the product can't be broken into sharp pieces or weapons. Higher-risk settings such as PICUs need 2mm.
• Cleanability. Staff should be able to clean inside without dismantling the product. Cleaning is a risk control in its own right; see our radiator cover specification guide.
• Evidence. Test reports from a UKAS-accredited lab, or through documented manufacturer lead testing.

Safe, but Still Somewhere to Recover

An environment that feels like a cell can make people feel distrusted and distressed, which works against recovery. The best anti-ligature design is barely noticeable. Products should come in calm colours, fit the room properly and let people keep some control, such as adjusting their own room temperature through an anti-ligature valve. Architects and specifiers have a big part to play here: the aim is a space that is both safe and therapeutic.

Contour's Anti-Ligature Range

Contour designs and manufactures anti-ligature products in the UK, made to measure for each site.

	Product	What it does	Find out more
	DeepClean Extra radiator guards	Anti-ligature, low surface temperature radiator guards with single-person cleaning access	Product page, What happens when you specify one
	Vertical DeepClean Extra	Floor-to-ceiling anti-ligature radiator for rooms with little wall space	Vertical anti-ligature radiator
	Window protectors	Steel-framed polycarbonate protection fitted over existing windows: surface-mounted, inset or external, with an optional integrated blind	Window protectors
	Anti-ligature ventilation grille	Small-hole grille that fits existing ventilation openings	Ventilation grille
	Anti-Ligature Ventilation System (ALVS)	Plenum and flush grille with tested airflow and noise data	ALVS
	Light switch cover	Lockable cover that stops switches being tampered with	Light switch cover
	Thermostat cover	Perforated, chamfered cover for wall thermostats	Thermostat cover
	Contour Secure cam locks	Flush security locks with a restricted key profile, keyed alike for ease of maintenance	Cam locks

Every product is made to order after a site survey. Anti-ligature radiators and guards are typically made in 15 working days from drawing approval and come with a two-year warranty. Contour is also BioCote's exclusive partner for anti-ligature and LST radiators and guards, with antimicrobial protection built into the powder coating.

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All Our Anti-Ligature Guides

Heating

• Anti-ligature radiator covers: a specification guide
• What happens when you specify an anti-ligature radiator cover
• Where the 2mm grille pattern comes from
• When you need an open-ended shoulder
• The vertical anti-ligature radiator
• Anti-ligature air conditioning guards

Ventilation

• Anti-ligature ventilation grilles for mental health wards
• Anti-ligature ventilation and noise
• Ventilation grilles for prisons and YOIs

Windows

• Anti-ligature window protection
• Installing and maintaining window protectors
• Why anti-ligature curtains aren't always enough

By Setting

• PICUs
• Section 136 suites
• Prisons and young offender institutions
• SEN schools
• Autism education
• Anti-ligature vs LST in schools and nurseries

Frequently Asked Questions

Is there a British Standard for anti-ligature products?

No. Suppliers should state what they tested, the method and the results. Informed Choices grading and UKAS-accredited lab reports are good evidence to ask for.

Is IP3X an anti-ligature standard?

No. IP3X (BS EN 60529) is an ingress test showing that objects wider than 2.5mm can't get through an opening. It's useful evidence for a grille, but anti-ligature performance also depends on shape, fixings, gaps and installation. More on grille guidance.

What is the difference between anti-ligature and low surface temperature?

Anti-ligature design reduces the chance of attaching a ligature. Low surface temperature (LST) design keeps touchable surfaces cool enough to prevent burns. Many settings need both.

Do anti-ligature radiator guards reduce heat output?

Yes. Enclosing a radiator behind a small-hole grille reduces its output, so heating should be sized with the guard in mind. Contour's DeepClean Extra output tables already allow for this. Our specification guide covers it in more detail.

How often should a ligature risk assessment be reviewed?

At least once a year, and after any incident or change to the building or how a space is used.

Can anti-ligature products be fitted to existing buildings?

Yes. Radiator guards, window protectors and ventilation grilles are all designed to be fitted during refurbishments, often without major building work.

Talk to Contour

Whether you're planning a new unit or upgrading a single ward, Contour can survey your site and recommend the right products. See what happens when you specify with us, arrange a free site survey or download the Anti-Ligature Design & Specification Guide.

If you've been affected by any of the issues in this guide, Samaritans are available day or night on 116 123.