Tree Safety and Risk Assessment

The Occupier's Liability (Scotland) Act 1960, The Occupier's Liability Acts 1957 and 1984 (in England), and 

The Health and Safety at Work etc. Act 1974, place a duty of care on property owners, occupiers or managers

to ensure, as far as is reasonably practicable, that people entering onto, or passing by the property do not 

suffer injury or damage as a result of any act or omission which could reasonably have been foreseen. The 

owner/occupier may be held liable for physical harm or damage to property arising from an accident to a third 

party, where the cause of the accident was both reasonably foreseeable and reasonably preventable, bearing 

in mind all the circumstances of the situation.

Regular inspection of trees on a property should therefore be undertaken by a competent person to identify 

any significant visible defects and assess the risk of those trees causing harm or damage. Recommendations 

for appropriate remedial works can then be made to control or eliminate the risk. Provided that any such 

works are carried out, the property owner or manager will have done all that can reasonably be required in law 

to comply with the requirements of the Acts.   

To help clients comply with their duty of care, we carry out surveys to identify hazardous trees, calculate the 

risk of harm arising from those trees, and on that basis specify any remedial works required to reduce or 

eliminate the risk. 

To calculate the risk of harm, we use the innovative Quantified Tree Risk Assessment system (QTRA), which 

applies established and accepted risk control principles to tree safety management in accordance with 

ISO 31000: 2009. It complies fully with Health and Safety Executive (HSE) guidance on risk assessment and 

The National Tree Safety Group's (NTSG) document “Common sense risk management of trees published by

The Forestry Commission in 2011.

We provide a cost-effective service which gives clients robust protection against litigation in the event of harm 

arising from tree failure, and also reduces the cost to their trees and finances of excessively cautious 

management. As we do not carry out tree work ourselves, we have no financial interest in specifying 

unnecessary and expensive work. This means we usually save clients considerably more than our fees have 


To learn more about how our services can be of benefit to you, please feel free to contact us. We would be 

happy to answer any queries you may have. 

Please contact us for more information

© TCG 2020