Rules for Drones in surveying
- Technology & AI
Rules for drones in surveying: the short version
The rules for drones in surveying are now settled enough that high quality building, roof and structure inspections are possible in almost any location. Drones carry a C classification. For surveying work only C0 and C1 matter: sub-250 gram mini drones are C0, and something like the DJI Air 3s is C1. Until December 2027 both carry effectively the same permissions. Beyond the aircraft itself you need three things: an Operator ID, which registers whoever is responsible for the drone and must be displayed on it, a Flyer ID for every pilot, obtained by passing the free CAA theory test, and commercial drone insurance meeting EU EC 785/2004. Most business public liability policies do not cover drones.
Key takeaways
- Only C0 (sub-250g mini drones) and C1 (for example the DJI Air 3s) classifications matter for surveying work
- Until December 2027 C0 and C1 carry effectively the same flying permissions
- An Operator ID registers the person responsible for the drone and must be visible on the aircraft. It costs around £12 and renews annually
- Every pilot needs a Flyer ID, obtained by passing the free 40-question CAA theory test. It lasts five years
- Commercial drone insurance is a CAA requirement under EU EC 785/2004. Most business public liability policies do not cover drones. Lessons from flying them in practice
I have been working commercially with drones for seven years now. In that time the drone landscape has changed massively, both in terms of the rules & regulations, and the hardware available.
When I started the rules were fairly stringent, and working with my fairly large, 2kg drone, there were many roof drone survey enquiries which I had to decline due to the inability to do them legally. The main requirement being the need for 50m separation from people.
But in the year that I started my drone inspection business there was a sea change in the rules, and in the drones available.
It became possible to fly Mini drones – sub 250 gram in weight – almost anywhere without restriction, and DJI accordingly introduced their ‘Mini’ drone to enable this kind of flying.
The camera on these drones was good enough for roof inspection work, and so the drone inspection requests for town centre or retail park roofs were now feasible, using Mini drones.
Fast-forward to January 2026 and we now have a set of drone rules and drone equipment which enable high quality building, roof and structure inspections in pretty much any location.
So for any surveyors considering using drones in their day-to-day work, here are the very basics which you need to know, and the equipment which will get you there and keep you on the right side of the law.
Drones are now classified. They have a ‘C’ label. C0, C1, C2……so on.
We are only concerned with the C0 & C1 classifications for the purposes of this blog.
So basically, there are only two drones worth considering if you haven’t already acquired one – both DJI (which in truth is the only supplier worth considering, and I have no special affiliation – just experience);
· Mini drone (Mini 3, 4 or 5 – any will do).
· Air 3s.
The mini drones are C0 classification. The Air 3s is C1 classification.
Confusingly, maybe, is the fact that they currently (till December 2027) both have the same permissions regarding drone flying – you can fly them anywhere with little restriction, other than flying them safely in respect of people and property.
The Mini, at 249 grams, is light, cheap and effective. But it only has the one camera lens.
The Air 3s, at about 770 grams, is more stable in the wind, but more importantly has two cameras. It has a standard wide-angle lens which is excellent, and a 70mm tele-photo lens which allows for close-up imagery of subjects.
The Air 3s has become my go-to drone in busy town areas where we can fly close to people legally. Note that this does not include fly over crowds or large of groups of people. The definition of large groupings is that any people under the drone need to be able to move away from a falling drone without impedance of other people – that they can get out of the way easily.
Other requirements are;
· Operator ID
· Flyer ID
· Commercial drone insurance.
Operator ID;
Every drone with a camera needs to have an Operator ID number attached to it. Think of this like a car’s registration number, except that if an individual or business owns more than one drone, all of their drones have the same Operator ID number.
The operator is the person responsible for managing a drone or model aircraft. This will be a person within the business who is designated as the manager (Operator) of the drones, or the individual who owns the drones. This means they’re responsible for things like maintaining it and ensuring any remote pilot who flies it holds the necessary level of competence (see Flyer ID section below). This person may not even actually fly the drones.
There is no prescription for the way that the Operator ID number is displayed on the drone. It can be anywhere on the drone, even concealed within the battery compartment, as long as it is visible for reading. It can be written on the drone in marker pen, a piece of sticky tape, or professionally printed labels.
The application for the Operator ID number is via the CAA website and costs about £12. It needs to be renewed every year. https://register-drones.caa.co.uk/choose-registration-path
Flyer ID;
Individual pilots, or flyers, of drones must have a Flyer ID number.
You must pass a CAA official theory test to get a Flyer ID before flying a drone. Visit the CAA registration portal to take the free, 40-question multiple-choice test.
You should carry a copy of your Flyer ID whenever you fly. The Police can ask to see it.
The Flyer ID is good for five years.
You’re responsible for flying safely and legally whenever you fly. https://www.caa.co.uk/drones/getting-started-with-drones-and-model-aircraft/get-a-flyer-id/
Commercial drone insurance;
If flying drones commercially – and that means any flights in connection with your work – drone-specific insurance is a requirement of CAA regulations. Most business public liability insurance policies do not cover drones, which require insurance in accordance with stipulation EU EC 785/2004 in the relevant statutory instrument.
Companies such as Coverdrone and Moonrock are long established providers of drone insurance.
Summary.
If you are, or are considering, using drones with cameras in your work there are legal requirements to comply with. A check-list for getting started with drones is;
o Type of drone (classification) – stick to C0 (sub 250gram Mini drones), or C1 (e.g. DJI Air 3s).
o Operator ID number – must appear on the drone somewhere.
o Flyer ID number – each pilot needs this.
o Commercial insurance policy.
A sensible practice is the keep documents relating to each of the above criteria with you at all times while using a drone. The Police can ask to see this information, and having it readily available can avoid unnecessary hassle if challenged by authorities.
Frequently asked questions
Do I need an Operator ID to use a drone for surveying?
Yes, if the drone has a camera. The Operator ID registers whoever is responsible for managing the drone. If an individual or business owns more than one drone, all of them carry the same Operator ID. It must be displayed somewhere visible on the aircraft, and there is no prescribed format: marker pen, tape or a printed label are all acceptable. It costs around £12 through the CAA website and renews annually.
What is the difference between an Operator ID and a Flyer ID?
The Operator ID belongs to the person responsible for the drone, who may never actually fly it. The Flyer ID belongs to each individual pilot. You get a Flyer ID by passing the CAA’s free 40-question multiple-choice theory test, and it lasts five years. Carry a copy whenever you fly, because the police can ask to see it.
Which drone should a surveyor buy?
For surveying work only two classifications matter, C0 and C1. In practice that means a mini drone at 249 grams (C0) or something like the DJI Air 3s at around 770 grams (C1). Until December 2027 both carry effectively the same flying permissions. The mini is light, cheap and effective but has a single lens. The Air 3s is more stable in wind and carries both a wide-angle and a 70mm telephoto lens for close-up detail.
Does my business public liability insurance cover drone work?
Almost certainly not. Most business public liability policies do not cover drones. Commercial drone flights require drone-specific insurance meeting stipulation EU EC 785/2004, and it is a CAA requirement for any flight connected with your work. Coverdrone and Moonrock are long established providers.
Can I fly a drone over people?
Not over crowds or large groups. The working definition is that anyone under the drone must be able to move away from a falling drone without being impeded by other people. In busy town areas you can fly close to people legally, which is why the Air 3s has become a practical choice for town centre and retail park roof work.
What should I carry with me on site?
Keep documents for each requirement with you whenever you are using a drone: Operator ID, Flyer ID and your commercial insurance policy. The police can ask to see this information, and having it to hand avoids unnecessary hassle if you are challenged.
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