Growing use of recreational drones with cameras is causing concern for farmers over their privacy and the safety of their livestock.
Some farmers and rural businesses have called for compulsory registration and insurance for drones.
The Country Land and Business Association (CLA) has called for changes to the law, which would mean users would need to seek the landowners' permission to fly over the land.
"The use of drones both commercially and for recreation is growing fast," CLA solicitor Andrew Gillett said.
"The sector has huge potential to benefit a wide range of industries, particularly in agriculture.
"However, it is vital that regulations keep pace with this change.
Farmers have concerns with recreational users flying surveillance drones of up to 20kg over their houses, gardens and fields which can cause a very real feeling of invasion of privacy.
There is currently no requirement for training or an assessment of capability for recreational drone users.
Livestock worrying
"These drones can also worry livestock as well as having the potential to cause damage if the pilot loses control," Mr Gillett said.
"If the drone is flown within the rules they are unlikely to be trespassing as a result of a statutory exemption for 'aircraft'.
"When you spot a drone flying over your property it can be difficult to determine whether it has onboard surveillance equipment.
"Then you need to find and identify the operator, who could be up to half a kilometre away from the drone.
"The uncertainty and huge costs involved in litigation, particularly with the complexity in the law of privacy is likely to be a deterrent to all but those with the deepest pockets."
