Prosecution: Cardiff University fined after workers developed occupational asthma

Exposure to workplace allergens can have serious and life-changing consequences. A recent HSE prosecution shows why employers must identify allergen risks early and ensure suitable controls are in place. Cardiff University was fined £280,000 after two employees developed occupational asthma due to prolonged exposure to animal allergens at work.

The prosecution

The HSE found that between 2008 and 2025, Cardiff University failed to properly assess and control employee exposure to animal allergens. Both affected workers were left with lifelong health conditions, and one employee was unable to continue in their role. The university pleaded guilty to breaching Section 2(1) of the Health and Safety at Work etc. Act 1974 and was also ordered to pay costs.

What are the risks?

Laboratory animal allergens can be found in dander, hair, scales, saliva, urine and other body wastes. These allergens can become airborne and contaminate surfaces and clothing, increasing the risk of sensitisation, allergic reactions and occupational asthma. Once asthma develops, the effects can be permanent and potentially career-ending.

What should employers do?

Where allergen exposure is possible, employers should carry out a suitable COSHH assessment and put effective controls in place. This may include ventilation and filtration, good hygiene and cleaning arrangements, safe systems of work, appropriate PPE, and health surveillance where required. Practical action and regular review are essential.

Good allergen management

As with all risks that may be present in the workplace, it is important to put appropriate control measures in place. Good allergen management will depend on the allergies and allergens present in your workplace and workforce. These could be known allergens in your work activities, or staff members with particular known allergies.

Steps taken will depend on the nature of the allergens and allergies, but could include the implementation of suitable policies, developing sensible procedures, providing appropriate training, ensuring adequate first aid cover, and conducting suitable individual or task-based risk assessments.

We can provide you with practical support and advice to ensure you are managing allergen risks appropriately. If you need help in this area, get in touch with LRB Consulting Ltd today to discuss how we can support you.