A woman who was injured when a tree branch fell on top of her in East Sussex is suing for GBP 300,000 compensation.
Doreen Prior, 58, was out on a country walk in Lewes when she was knocked unconscious by a falling branch.
Mrs Prior said she has not been able to work as a teacher since the incident as she suffers from memory loss, fatigue and a lack of concentration.
She is suing the Environment Agency because she claims they failed to remove the branch before it fell and this incident could have had more serious consequences for children.
Documents outlining the case have been submitted to the High Court.
They read: "The injuries she sustained have had a huge impact on her day to day life leaving her heavily reliant on family and friends for financial and emotional support."
Solicitors say if the compensation claim is successful it could lead to more rigorous inspection of trees.
Last week another teacher failed in her attempt to sue the London Borough of Newham after a pupil laced her water bottle with board cleaning fluid.
The pupil had gained access to a room where Shaaira Alexis was teaching in order to carry out the spiking.