DJI Mini 3 UK Drone Rules

The DJI Mini 3 in the UK Regulatory Framework

The DJI Mini 3 sits comfortably within the sub-250g category with a listed MTOM of 248g. This places it 2 grams below the critical 250g threshold under UK CAA regulations. Unlike its sibling the Mini 4 Pro, which sits at 249g with its standard battery, the Mini 3 has a slightly larger margin before reaching the weight limit.

A C0 class marking is available for the DJI Mini 3. This classification, issued under the UK UAS regulatory framework, confirms the drone meets the technical requirements for the lightest drone class. With this marking, the Mini 3 benefits from the most permissive operational rules available in the Open category.

Mini 3 vs Mini 3 Pro: A Compliance Distinction

One of the most common sources of confusion in the DJI Mini range is the difference between the DJI Mini 3 and the DJI Mini 3 Pro. These are separate products with different specifications, sensor configurations, and capabilities.

The DJI Mini 3 Pro has a listed MTOM of 249g, which also keeps it under the 250g threshold. Both models can carry a C0 class marking. However, the Mini 3 Pro includes obstacle avoidance sensors that the standard Mini 3 does not have, and offers different camera specifications.

From a pure regulatory perspective, both the Mini 3 and Mini 3 Pro occupy the same compliance position when operating with their standard batteries and carrying a C0 mark. The practical differences relate to features and capabilities rather than the rules that apply. What matters is confirming which model you actually own and whether your specific unit has the C0 class marking.

C0 Class Marking and the A1 Subcategory

With a C0 class marking, the DJI Mini 3 operates in the A1 subcategory under UAS.OPEN.020. This subcategory allows:

• Flight over uninvolved people, provided the pilot does not intentionally fly over assemblies of people
• Operation close to people who are not participating in the drone operation
• No requirement for additional pilot competency beyond the Flyer ID theory test

Without a C0 mark, the Mini 3 would still fly in A1 under legacy transitional provisions, but the pilot would need to avoid intentionally flying over uninvolved people entirely. This distinction matters in practice: flying over a public footpath, a beach, or a park where people are present is treated differently depending on whether your drone carries the C0 marking.

CAA Registration for the DJI Mini 3

The DJI Mini 3 has a built-in camera capable of 4K HDR recording. This camera triggers the Operator ID requirement regardless of the drone weight. Your registration obligations are:

• Flyer ID: Required for all drone pilots. Obtained by passing the CAA online theory test. Free of charge and valid for 5 years. Minimum age 12 years
• Operator ID: Required because the Mini 3 has a camera. Annual cost of 10.33 GBP. Must be physically displayed on the drone. A person under 18 must have a parent or guardian register as the operator

Both IDs are obtained through the CAA Register Drones service. The Flyer ID demonstrates you understand the rules; the Operator ID identifies you as the person responsible for the drone.

Camera and Privacy Obligations

The DJI Mini 3 features a 4K HDR camera on a 3-axis gimbal, making it a capable aerial photography and videography platform. This capability brings privacy obligations under UK data protection law.

When your Mini 3 captures footage of identifiable individuals, you are processing personal data under the UK GDPR and the Data Protection Act 2018. For purely recreational flying, the domestic purposes exemption may apply, but this is interpreted narrowly by the ICO. If you publish footage online, use it commercially, or deliberately film specific individuals, the exemption is unlikely to apply.

Practical steps to manage privacy obligations include:

• Avoid deliberately filming individuals without their consent
• Be aware of areas where people have a reasonable expectation of privacy, such as private gardens and through windows
• If filming for commercial purposes, consider a Data Protection Impact Assessment
• Delete footage you do not need rather than storing it indefinitely

Operational Rules and Restrictions

When flying the DJI Mini 3 in the UK with the C0 class marking, these operational rules apply:

• Maximum altitude of 120 metres (400 feet) above the surface
• Visual line of sight must be maintained at all times
• Flight over uninvolved people is permitted; flight over assemblies of people is not
• Flight Restriction Zones must be respected, including those around airports, military installations, and prisons
• The Drone and Model Aircraft Code applies at all times
• Night flying requires the drone to have appropriate lighting visible to the pilot

The DJI Mini 3 connects to the DJI Fly app, which includes geofencing data for known restricted zones. This provides an additional layer of awareness, but does not replace your obligation to check restrictions independently. Temporary restrictions, NOTAMs, and recently established zones may not be reflected in the app.

Weight Considerations and Accessories

The Mini 3 listed weight of 248g applies to the drone in its standard configuration. Adding accessories can change the total weight:

• Propeller guards: These add weight and may push the total above 250g. Weigh the drone with guards fitted before flying
• ND filters: Third-party filters vary in weight. Most are light enough not to exceed the threshold, but check rather than assume
• Battery variants: If DJI or third-party manufacturers offer alternative batteries, check the total MTOM with each battery type

The key principle is straightforward: the regulatory classification depends on the actual weight of the drone as you intend to fly it, not the weight listed on the box. If any accessory or modification pushes the total above 250g, different rules apply. Check the manufacturer specifications for your specific model and firmware version, and weigh the drone in your actual flight configuration.

Flying the Mini 3 in Specific UK Locations

The sub-250g weight class of the DJI Mini 3 provides some advantages in specific locations, but does not override all restrictions:

• National Parks: No specific national drone ban in UK National Parks, but individual byelaws may restrict take-off and landing. Sub-250g status does not create an exemption from local byelaws
• Urban areas: The C0 class marking allows flight over uninvolved people, which is the primary advantage in urban settings. Standard airspace restrictions still apply
• Coastal areas: Sub-250g drones are more susceptible to wind. The CAA does not set specific wind limits, but you must always fly safely for the conditions
• Near airports: Flight Restriction Zones apply equally to all drones regardless of weight. The sub-250g classification provides no exemption from airport restrictions