Fine after employee killed operating ride-on lawnmower

Kamil Grygieniec, 23, from Northallerton, was cutting grass around a village pond in North Stainley on 8 October 2021 when the ride-on mower he was operating descended a steep incline and ended up in it.

The mower was being used without a safety-critical roll-over protection system (ROPS) fitted.

An investigation by the Health and Safety Executive (HSE) found that MHS Countryside Management Limited had failed to carry out a suitable and sufficient site-specific risk assessment for the work being undertaken.

The investigation also established that the mower’s roll-over protection system (ROPS) had been removed at some point prior to the work taking place. ROPS are designed to protect operators in the event of a machine overturning and are a critical safety feature when working on uneven or sloping ground.

The lawnmower involved

Suitable risk assessment is essential when operating ride-on machinery, particularly while doing so on slopes or near water. Employers must ensure equipment is appropriate for the terrain and fitted with necessary safety features to protect operators. Find out more on our website here Risk assessment: Template and examples – HSE.

MHS Countryside Management Limited, of Bishop Auckland, pleaded guilty to breaching Section 2(1) of the Health and Safety at Work etc. Act 1974. The company was fined £27,000 and ordered to pay £11,166 in costs at York Magistrates’ Court on the 17 February 2026.

Kamil’s mother and father said: “The pain I feel every day since that tragedy is unimaginable, I do not wish that on anybody. That day I lost part of me.

“What makes it even worse, I believe his death could have been prevented and should never have happened.”

After the hearing, HSE inspector Darian Dundas said: “This is a profoundly tragic case which is made all the more harrowing because the safety feature designed to prevent incidents like this had been removed from the lawnmower – leading to the fatal turn of events which has robbed a family of their loved one.

“The completion of a suitable and sufficient site-specific risk assessment is vital before undertaking work activities and ensures appropriate action can be taken to eliminate hazards or, where this is not possible, to properly control the risks.

“In this case, the failure to assess the risks and ensure suitable safety measures were in place resulted in a tragic and entirely avoidable loss of life.”

This prosecution was brought by HSE enforcement lawyer Iain Jordan and supported by paralegal officer Stephen Grabe.