The A2 CofC 30m Rule Explained for UK Pilots

The 30m rule is the headline feature of the A2 Certificate of Competency (A2 CofC). It is also one of the most misunderstood. This guide breaks down exactly what the rule means, how the 5m exception works, and how to apply it safely in the field.

What the 30m rule actually says

With an A2 CofC, a C2-class drone flown in the A2 subcategory may be operated as close as 30 metres horizontally from uninvolved people. This is a minimum separation distance: you must not let the drone come closer than 30 metres to people who are not part of your operation.

The 5m low-speed exception

Many C2-class drones include a low-speed (slow-speed) mode that limits the aircraft's maximum speed. When this mode is active, the minimum horizontal separation reduces from 30 metres to 5 metres from uninvolved people. The logic is that a slower drone poses a lower risk if something goes wrong, so a closer approach is permitted. You must actually have the mode engaged to rely on the 5m figure.

How to measure 30 metres in practice

• Horizontal, not slant, distance. The rule refers to horizontal distance from people, so altitude does not count towards the 30m.
• Use reference points. Identify fixed landmarks roughly 30 metres apart to judge distance during the flight.
• Build in a margin. Wind, drift and reaction time mean you should aim for more than the bare minimum.
• Watch for movement. People walk, so a 30m gap can close quickly. Maintain separation continuously, not just at launch.

What the 30m rule does not allow

The 30m and 5m distances apply to flying near people. They never authorise flying over an assembly of people or a crowd, which remains prohibited across the entire Open Category. The rule is about lateral proximity, not overflight.

Why the rule exists

The separation distances are a risk-management tool. They give time and space to react if the drone behaves unexpectedly, reducing the chance of injury to bystanders. Treating them as safety buffers rather than targets to push against is the responsible approach.

Summary

The A2 CofC 30m rule lets you fly a C2-class drone within 30 metres horizontally of uninvolved people, or 5 metres in an active low-speed mode. Measure horizontally, keep a margin, watch for movement, and never overfly crowds.