As a powered gate owner, what are the legal implications for me if a gate on my property causes an accident?

You have a duty of care to ensure that your gate is safe and that any users of the gate can operate and use it safely. In the event of an accident you may be prosecuted under the Health & Safety at Work Act.  Using an NSI approved company ensures it will be installed to meet the requirements of DHF TS 011 Code of Practice for the Design, Manufacture, Installation & Maintenance of Automated Gates & Traffic Barriers, which reflects the current state of the art in automated gate installation and maintenance.