Tree owners are legally required to ensure their tree(s) do not grow too close to electricity network lines. The Electricity (Hazards from Trees) Regulations 2003 were introduced by the Government because trees need to be kept at a safe distance from electricity lines for public safety and to protect the electricity supply.
Trees close to power lines are dangerous for a number of reasons. Falling branches can break lines, causing fire and the risk of electrocution. Children can, and have, suffered tragic electric shocks when climbing trees close to lines. Trees can also damage power lines and equipment during high winds - causing power failures, electricity surges and appliance damage, fire and danger to the public.
The regulations set rules which make tree owners responsible for having their trees trimmed when they grow too close to electricity network lines. Electricity network companies are responsible for issuing notices to tree owners when their tree(s) are found growing too close to their lines.