The British Horseracing Authority (BHA) says drones will be permitted to cover most live racing events despite causing an incident earlier this year.

In July, the BHA suspended the use of drones at its UK racecourses following an incident in which a drone reportedly got too close to the action. The sound of the drone’s engine spooked Oh So Terrible, which reared up and collided with the rail at the British Stallion Studs EBF Maiden Fillies’ Stakes, sending jockey Frankie Dettori to the turf.

On Friday, the BHA posted a notice saying that a consultation with the Racecourse Association, Professional Jockeys Association and National Trainers Foundation had produced an agreement on new guidelines for “safe and controlled” drone use.

The guidelines prohibit the use of drones in maiden class races or races confined to two-year-old nags. Drones must maintain a minimum altitude of 50m from the ground at the start of races, while a minimum altitude of 30m must be maintained when drones are following the action from the side or the rear.