Paperwork is the least glamorous part of flying drones for a living. It is also the part that protects you. I trained as an engineer in the RAF, where the checklist is not optional, and we run Skykam the same way.
If you commission drone surveys, you share an interest in the operator being legal. An unauthorised flight can stop work on site, invalidate insurance and, in the worst case, expose you to reputational and legal risk. The UK rules were substantially updated on 1 January 2026, with new registration thresholds, a UK class marking scheme and Remote ID. This guide explains the framework as it applies to commercial survey work and gives a checklist of what to ask a contractor.
The legal framework in brief
UK drone operations are governed mainly by UK Regulation (EU) 2019/947, retained in UK law after Brexit and amended by the UK, together with the Air Navigation Order 2016. The Civil Aviation Authority (CAA) is the regulator. The rules are risk-based: they depend on what the aircraft is, where it flies and how close it gets to people, rather than on whether the flight is commercial. Being paid for a flight does not, by itself, require a particular permission. What matters is whether the operation fits within the limits of the Open category.
Open, Specific and Certified categories
| Category | What it covers | Typical survey relevance |
|---|---|---|
| Open | Lower-risk flights within fixed limits: below 120 m, within visual line of sight, under 25 kg, with subcategories (A1, A2, A3) setting distances from people | Small aircraft on open sites away from people and buildings |
| Specific | Operations outside Open category limits, authorised by the CAA through an Operational Authorisation based on a risk assessment | Most professional survey work with enterprise aircraft, especially near people, roads or buildings |
| Certified | Highest-risk operations, regulated similarly to manned aviation | Not relevant to routine survey work |
Enterprise survey aircraft such as the DJI Matrice 350 RTK weigh several kilograms with a LiDAR or high-resolution camera payload. Under the Open category, an aircraft of that weight without an appropriate class mark is limited to the A3 subcategory: flights far from uninvolved people and at least 150 m horizontally from residential, commercial, industrial and recreational areas. Many survey sites, from housing land beside existing estates to highway verges and quarries with offices and weighbridges, cannot meet those limits. That is why established survey operators work under a Specific category Operational Authorisation.
Registration: Operator ID and Flyer ID
From 1 January 2026, the registration thresholds dropped from 250 g to 100 g.
- Operator ID: the organisation responsible for the drone must register with the CAA if it operates a drone of 100 g or more with a camera, or any drone of 250 g or more. The Operator ID must be renewed annually and displayed on every aircraft.
- Flyer ID: every person flying a drone of 100 g or more must pass the CAA's online theory test. The Flyer ID is a prerequisite for all other remote pilot qualifications.
For a survey contractor, the Operator ID is the company's registration and the Flyer ID belongs to each individual pilot. Ask for both.
Remote pilot qualifications
- A2 Certificate of Competency (A2 CofC): an Open category qualification allowing suitably class-marked or lighter aircraft to be flown closer to people in the A2 subcategory. Useful, but not sufficient on its own for most enterprise survey operations.
- General Visual Line of Sight Certificate (GVC): the established qualification for Specific category operations within visual line of sight, including those under the standard PDRA01 authorisation. It is valid for five years. The CAA has stated that the GVC will stop being issued on 31 December 2027; existing GVCs remain acceptable until they expire where the Operational Authorisation accepts them.
- Remote Pilot Certificates (RPC-L1, L2 and L3): the CAA's newer tiered qualifications for the Specific category. RPC-L1 covers visual line of sight operations and is accepted alongside the GVC for PDRA01. Levels 2 and 3 cover progressively more complex operations, such as beyond visual line of sight.
Qualifications are only part of competence. Under PDRA01, the CAA also expects pilots to maintain recent flying experience, and a good operator will maintain training records, currency checks and type-specific training for each aircraft and sensor.
Operational Authorisations and PDRA01
An Operational Authorisation (OA) is the CAA's permission for a named operator to conduct defined operations in the Specific category. The operator must hold an approved Operations Manual, carry appropriate insurance and renew the authorisation periodically.
The most common route for survey work is PDRA01, a pre-defined risk assessment for visual line of sight operations. Its key limits include:
- Aircraft under 25 kg maximum take-off mass.
- Maximum height of 120 m above the surface, with limited provision to overfly tall obstacles.
- Visual line of sight, no more than 500 m from the remote pilot.
- No flight within 50 m of uninvolved people, reduced to 30 m during take-off and landing.
- Horizontal separation from assemblies of people at least equal to the aircraft's height.
- Authorisation valid for 12 months, renewed annually.
Operations that fall outside these limits, such as beyond visual line of sight corridor surveys or flights closer to people, need an operator-specific authorisation supported by a fuller safety case, typically using the SORA (Specific Operations Risk Assessment) methodology. These take longer to obtain and should be planned well ahead.
UK class marks from 1 January 2026
From 1 January 2026, new drone models placed on the UK market must carry a UK class mark from UK0 to UK6. The class mark shows which Open subcategory an aircraft can use, or, for UK5 and UK6, that it is designed for Specific category operations under an Operational Authorisation.
| Class | Mass limit | Main use |
|---|---|---|
| UK0 | Under 250 g | Open A1 |
| UK1 | Under 900 g | Open A1 |
| UK2 | Under 4 kg | Open A2 with A2 CofC, otherwise A3 |
| UK3 | Under 25 kg, max dimension 3 m | Open A3 |
| UK4 | Under 25 kg | Open A3 (typically model aircraft) |
| UK5 | Under 25 kg | Specific category, with an Operational Authorisation |
| UK6 | Under 25 kg, max dimension 3 m | Specific category, with an Operational Authorisation |
Aircraft without a UK class mark become “legacy” aircraft, and in the Open category their permitted subcategory depends on their mass. Aircraft carrying European C class marks can be flown as if they held the corresponding UK class until 31 December 2027. From 1 January 2028, they are treated as legacy aircraft. Specific category operations are governed by the terms of the Operational Authorisation rather than by class marks alone, which is why most professional survey fleets, including legacy enterprise aircraft, continue to operate under an OA.
Remote ID
Remote ID is a broadcast from the aircraft of its identity (including the Operator ID), position, height and the remote pilot's location, receivable by authorities and others nearby. It is being introduced in stages:
- From 1 January 2026: required on UK1, UK2 and UK3 class aircraft in the Open category, and on UK5 and UK6 class aircraft used in the Specific category. The operator must enter their Remote ID details into the aircraft and keep the function switched on in flight.
- From 1 January 2028: required on legacy aircraft, privately built aircraft and UK0 aircraft of 100 g or more with a camera, and on UK4 model aircraft, unless an exemption applies.
Many enterprise aircraft already broadcast Remote ID or can be fitted with a module. When commissioning work now, it is reasonable to ask a contractor how their fleet will meet the 2028 deadline.
Airspace and flight restriction zones
Authorisations do not override airspace restrictions. Before each job, the operator should check the airspace and any temporary restrictions notified by NOTAM.
- Aerodrome flight restriction zones (FRZs) surround protected aerodromes and their runways. Flying any drone inside an FRZ requires permission from air traffic control or the aerodrome operator, regardless of the aircraft's weight or the operator's authorisation.
- Controlled airspace, such as around major airports, may require coordination with the relevant air navigation service provider.
- Restricted, prohibited and danger areas, including some military ranges and sensitive sites, have their own conditions.
- Temporary restrictions are imposed for events, emergencies and VIP movements, sometimes at short notice.
Survey sites near airports are routinely flown with permission, but securing it can take days or weeks. Mention any nearby aerodrome when you request a quote.
Landowner permission, privacy and site rules
The CAA regulates the flight, not the use of land. Separate permissions are needed to take off and land on private land, and some landowners and public bodies have byelaws restricting drone flights on their property. On most commercial surveys, the client arranges access; the operator should confirm this in writing.
Survey imagery can capture people, vehicles and private property. Operators processing that data are subject to UK GDPR and should be registered with the Information Commissioner's Office. Ask how imagery is stored, who can access it and how long it is kept.
“A reputable operator will send you their Operator ID, Operational Authorisation and insurance before you ask. If they hesitate, keep looking.”
What to ask your drone survey contractor
- Their CAA Operator ID and a copy of their current Operational Authorisation, including its expiry date and the operations it covers.
- Evidence of remote pilot competence for the pilots who will fly your job: Flyer ID and GVC or RPC, plus any A2 CofC.
- Insurance: aviation third-party liability meeting the statutory requirements, public liability, employers' liability and professional indemnity, with limits suitable for your contract.
- A site-specific risk assessment and method statement (RAMS), including how separation from uninvolved people will be maintained.
- Confirmation that airspace has been checked, and any FRZ or controlled airspace permissions obtained.
- How their aircraft comply with Remote ID now and how they will meet the 2028 requirements.
- Their data protection arrangements and ICO registration.
- Accident and incident reporting procedures, including reporting to the CAA and to you.
Skykam operates under a CAA Operational Authorisation in the Specific category with qualified remote pilots and aviation liability insurance, and supplies RAMS, authorisation and insurance documents with every quote on request.
