Sub-250g Drone Night Flying in the UK

Night Flying Is Permitted Under Specific Conditions

Unlike some countries that impose blanket bans on recreational night flying, the UK allows sub-250g drone flights after dark. The CAA framework does not distinguish between day and night for Open Category operations in terms of permission to fly. However, it does impose additional requirements to ensure safety during reduced visibility conditions.

The primary challenge of night flying is maintaining Visual Line of Sight. The CAA requires you to keep your drone in sight at all times during Open Category flights. At night, this becomes significantly more difficult, which is why lighting requirements exist.

Article 94A Lighting Requirements

Article 94A of the Air Navigation Order 2016 (as amended) sets out the lighting rules for unmanned aircraft flown at night. The key requirement is that your drone must be fitted with a flashing green light that is visible from the ground.

What this means in practice:

• The light must be green and must flash (not steady).
• It must be visible to the remote pilot from the ground at all times during the flight.
• The purpose is to help you maintain VLOS and to make the drone visible to other airspace users.
• Many modern sub-250g drones come with built-in LED lights, but check whether they meet the green flashing requirement. Some stock LEDs may not be sufficient.

Aftermarket strobe lights designed for drones are widely available and typically weigh only a few grams. Adding one to your sub-250g drone is straightforward, though you must ensure the combined weight does not push the drone above 250g, which would change its regulatory classification.

Visual Line of Sight at Night

VLOS is the single biggest operational challenge for night flying. During daylight, most pilots can see their drone several hundred metres away. At night, visibility drops dramatically, even with lighting.

Practical considerations for maintaining VLOS at night:

• Reduced effective range: Even with a strobe light, you will likely lose visual contact at a much shorter distance than during daytime. Plan for a significantly shorter operating radius.
• Orientation awareness: Knowing which way your drone is facing becomes much harder at night. Multi-coloured navigation lights (such as red and green on different arms) can help with orientation.
• Background lighting: In urban areas, street lights and building lights may actually help you track your drone. In rural darkness, your drone light will stand out but depth perception becomes poor.
• Weather and atmospheric conditions: Fog, mist, and low cloud reduce visibility dramatically. If conditions deteriorate, land immediately.

All Standard Rules Still Apply

Flying at night does not relax any other CAA regulations. You must still comply with:

1. 400ft (120m) altitude ceiling: The maximum altitude remains 400ft AGL, day or night.
2. Flight Restriction Zones: FRZs around airports and other protected sites apply around the clock. Sub-250g weight does not provide exemption.
3. Registration: You still need a valid Operator ID and Flyer ID from the CAA DMARES system.
4. Privacy and data protection: The UK GDPR and Data Protection Act 2018 apply regardless of when you fly. Recording people or private property without consent is potentially unlawful.
5. The Drone Code: Follow the CAA Drone Code at all times.

When Night Flying Makes Sense

There are several legitimate and popular reasons to fly a sub-250g drone at night in the UK:

• Sunset and twilight photography: Many stunning aerial shots are captured during the golden hour and blue hour immediately after sunset.
• Winter flying: In the UK, sunset can be as early as 15:45 in December. If you want to fly after work, night flying rules will apply for much of the winter season.
• Light trail photography: Capturing traffic light trails and illuminated landmarks at night is a popular creative application.
• Property and event coverage: Illuminated buildings, festivals, and seasonal light displays can be captured effectively from the air.

Safety Recommendations for Night Flying

• Scout your flying location during daylight first. Identify obstacles, power lines, and terrain features that will be invisible at night.
• Set your drone return-to-home altitude conservatively to clear any obstacles you mapped during your daytime reconnaissance.
• Fly lower and closer than you would during the day. Your reaction time to unexpected situations is slower when visibility is reduced.
• Bring a spotter. A second person can help track the drone and watch for hazards you might miss.
• Check your battery levels more frequently. Cold night temperatures reduce battery performance, and a forced landing in darkness is far riskier than in daylight.
• Always carry a torch and wear high-visibility clothing if flying near roads or paths.