Can Sub-250g Drones Fly Over People in the UK?

The Two Categories of Sub-250g Drones

The ability of a sub-250g drone to fly over people is determined entirely by whether the drone carries a C0 class mark. This is a manufacturer-applied designation that indicates the drone meets specific safety standards set by the CAA and its European equivalents. Understanding which category your drone falls into is essential before you plan any flight near populated areas.

Most sub-250g drones currently in circulation in the UK are legacy models — they were manufactured or placed on the market before the class marking system was fully implemented. As more C0-marked drones enter the market, the distinction will become increasingly important for pilots planning flights in urban or populated environments.

C0 Class Marked Drones: Flying Over Uninvolved People

Sub-250g drones that carry the official C0 class mark are permitted to fly over uninvolved people under the Open A1 subcategory. This is a significant operational advantage that opens up a range of flight scenarios that would otherwise be restricted.

What Counts as an Uninvolved Person

An uninvolved person is anyone who is not participating in or aware of the drone operation. This includes pedestrians on a pavement, shoppers in an outdoor market, people sitting in a park, or anyone else who has not been informed of and agreed to the drone flight taking place above them.

With a C0-marked sub-250g drone, you may fly directly over these individuals without needing their consent or needing to maintain a specific horizontal distance. This does not mean you should fly recklessly — you must still operate safely and responsibly, minimising the time spent over people and being prepared to move away immediately if conditions change.

The Crowd Restriction Remains

Even C0-marked drones must not fly over crowds or organised assemblies of people. The CAA defines an assembly of people as a gathering where the density of people is such that individuals would have difficulty moving away from the area. Examples include:

• Concerts and music festivals
• Sporting events — both on the pitch and in spectator areas
• Political rallies and demonstrations
• Parades and processions
• Fireworks displays
• Outdoor markets during peak hours where movement is restricted

The distinction between a few uninvolved people and a crowd requires on-the-ground judgement. A high street with moderate pedestrian traffic is generally acceptable for C0 overflight. A Christmas market where people are packed shoulder to shoulder is not.

Legacy Drones: No Intentional Overflight of People

If your sub-250g drone does not have a C0 class mark, it is classified as a legacy drone under the UK's transitional provisions. Legacy sub-250g drones can still fly in the Open A1 subcategory, which is the least restrictive operational zone. However, you must not intentionally fly over uninvolved people.

What This Means in Practice

The key word is "intentionally." The CAA recognises that a drone flying in a populated area may briefly pass over someone — for example, during a turn or while repositioning. This incidental overflight is not the same as deliberately flying your route directly above pedestrians.

In practical terms, legacy sub-250g drone pilots should:

• Plan flight paths that avoid overflying groups of people wherever possible
• Keep overflight of individuals brief and incidental rather than sustained
• Be prepared to change course if people move into your flight path
• Avoid hovering directly above any person who has not consented to the flight

There is no fixed minimum horizontal distance that legacy sub-250g drones must maintain from uninvolved people, unlike heavier drones in the A2 subcategory which must keep 30m (or 5m with a C2 drone in low-speed mode). The requirement for legacy sub-250g is behavioural rather than metric — do not deliberately fly over people.

How to Check If Your Drone Has a C0 Class Mark

The C0 class mark is a physical label applied by the manufacturer, typically found on the drone's body or in its documentation. Look for:

• A label or marking that reads "C0" on the drone's fuselage or underside
• Reference to C0 classification in the drone's user manual or technical specifications
• C0 designation on the drone's packaging or product listing

If your drone does not display a C0 mark and was not marketed as C0 compliant, treat it as a legacy drone. Applying your own C0 label does not change your drone's classification — the mark must come from the manufacturer based on compliance with the relevant technical standards.

Congested Areas and Built-Up Zones

Flying over people often intersects with the question of flying in congested areas. A congested area is broadly defined as any area substantially used for residential, commercial, industrial, or recreational purposes. Towns, cities, and villages all qualify.

Sub-250g drones — both C0 and legacy — can fly in congested areas under the Open A1 subcategory. This is one of the key advantages of the sub-250g weight class compared to heavier drones, which face more restrictive requirements in congested zones. However, flying in a congested area does not override the rules about people — you must still follow the C0 vs legacy framework described above.

Practical Scenarios Explained

To illustrate how these rules work in real situations:

Filming a Landscape From a Park

You are in a public park filming scenery. A few dog walkers are in the area. With a C0 drone, you may fly over them. With a legacy drone, plan your route to avoid overflying them, though brief incidental passes during repositioning are acceptable.

Filming an Outdoor Wedding

A wedding with 100 guests gathered in an outdoor venue constitutes an assembly of people. Neither C0 nor legacy sub-250g drones may fly over the gathering. You could position your drone to capture footage from the side or from a distance, but direct overflight of the crowd is prohibited.

Flying in a Town Centre

A moderately busy high street with shoppers moving freely is generally acceptable for C0 overflight. If the street becomes densely packed — such as during a sale event or holiday rush — and people can no longer move freely, it becomes an assembly and overflight must stop.

Privacy Considerations When Flying Over People

Even when overflight is legally permitted from an aviation standpoint, privacy obligations remain. If your drone is capturing footage that identifies individuals, you must comply with UK data protection law. The Information Commissioner's Office advises drone operators to consider whether filming is proportionate, whether individuals have a reasonable expectation of privacy, and whether the footage will be published or shared.

Flying directly over people with a camera — even legally — can generate complaints and police attention. Being technically compliant with aviation law does not automatically mean your filming is compliant with data protection law. Both frameworks apply simultaneously.

Penalties for Dangerous Flying Over People

Deliberately endangering people by flying a drone recklessly or negligently is a serious offence under the Air Navigation Order. This applies to all drones regardless of weight or class mark. If your overflight of people is conducted in a manner that creates danger — flying too low, too fast, or losing control — you could face prosecution with penalties including unlimited fines and up to five years in prison.

The CAA takes reports of dangerous drone operations seriously and works with police forces to investigate incidents. Even if your drone weighs under 250g, causing injury or alarm through careless flying will result in enforcement action.