Drone Subcontracting Rules in the UK: Legal Requirements for Outsourcing Drone Operations

Why Subcontracting Drone Operations Requires Careful Planning

The UK commercial drone sector has grown rapidly, and many operators now subcontract specialised aerial work to third parties. Whether you are a surveying firm outsourcing thermographic inspections or a construction company hiring drone pilots for site mapping, understanding the legal framework is essential to avoid regulatory breaches and liability exposure.

Under UK law, subcontracting drone operations does not transfer your legal obligations. The Air Navigation Order 2016 (ANO 2016) places duties on both the person commissioning the flight and the remote pilot conducting it. Getting this wrong can result in enforcement action from the Civil Aviation Authority (CAA) against either or both parties.

The Liability Chain: Who Is Responsible?

When you subcontract drone work, a liability chain is created between the client, the primary contractor and the subcontracted operator. Each link in this chain carries specific responsibilities:

• The client must ensure they engage an operator who holds appropriate CAA authorisations for the work being performed
• The primary contractor retains overarching responsibility for the project and must verify the subcontractor meets all regulatory requirements
• The subcontracted operator must hold their own Operator ID, ensure their remote pilots have valid Flyer IDs, and maintain current insurance

Under CAP 722, the remote pilot always retains personal responsibility for the safe conduct of the flight, regardless of any contractual arrangements between businesses. This means a subcontracted pilot cannot use contractual terms as a defence for unsafe operations.

Essential Checks Before Subcontracting

Before engaging a subcontractor for drone operations, you should verify several critical documents and qualifications:

1. CAA Registration and Operator ID

Every commercial drone operator in the UK must hold a valid Operator ID issued by the CAA. Request the subcontractor provides their Operator ID number and verify it is current. The Operator ID must be displayed on every drone the subcontractor uses.

2. Remote Pilot Competency

Depending on the category of operation, remote pilots need different levels of competency certification. For Open Category work, this means at minimum a Flyer ID. For more complex operations in the Specific Category, pilots may need an A2 Certificate of Competency (A2 CofC) or a General VLOS Certificate (GVC) issued by a CAA-recognised assessment entity.

3. Insurance Coverage

Under EC Regulation 785/2004 (retained in UK law), any drone weighing 20 kg or more used for commercial purposes requires third-party liability insurance. In practice, most professional operators carry insurance regardless of drone weight. Verify the subcontractor holds adequate coverage and that the policy covers the specific type of work being performed.

4. Operational Authorisation

Operations in the Specific Category require an Operational Authorisation (OA) from the CAA. If the subcontracted work involves flying in congested areas, beyond visual line of sight, or near people, confirm the subcontractor holds the appropriate OA for that activity.

Drafting the Subcontracting Agreement

A robust subcontracting agreement should address several drone-specific elements beyond standard commercial terms:

• Scope of authorisation: Specify exactly which operations the subcontractor is authorised to perform and any geographical or temporal limitations
• Data handling: Aerial data captured by drones may contain personal data subject to UK GDPR. Define who owns the data, how it will be processed and stored, and who acts as data controller versus data processor
• Incident reporting: Establish clear procedures for reporting accidents, near-misses and mandatory occurrence reports (MORs) to the CAA, including who is responsible for filing each report
• Equipment standards: Specify minimum equipment requirements, including drone class markings, firmware currency and maintenance records
• Site risk assessments: Define responsibility for conducting and documenting pre-flight site assessments in accordance with CAP 722 guidance

Mandatory Occurrence Reporting for Subcontracted Work

When incidents occur during subcontracted operations, both the primary contractor and the subcontractor may have reporting obligations. Under CAP 722 and the CAA Mandatory Occurrence Reporting scheme, the remote pilot and the operator must report specific events including:

• Any collision or near-miss with a manned aircraft
• Injury to any person caused by the drone or its operation
• Loss of control or flyaway incidents
• Damage to third-party property

Your subcontracting agreement should clearly state which party files the MOR and establish a communication protocol so reports are submitted within the required timeframes.

Tax and Employment Considerations

If you regularly subcontract to the same drone pilot, be aware of IR35 (off-payroll working rules). HMRC may classify a subcontractor as an employee if they work exclusively for one client, use client equipment, or have little control over how the work is performed. This applies to drone operations just as it does to any other professional services engagement. Ensure your working arrangements genuinely reflect a subcontracting relationship to avoid unexpected tax liabilities.

Best Practices for Managing Subcontractors

Successful subcontracting requires ongoing management, not just initial due diligence:

• Maintain a register of approved subcontractors with copies of their current authorisations, insurance certificates and pilot credentials
• Set calendar reminders to re-verify documents before they expire
• Conduct periodic quality audits of subcontracted work, including reviewing flight logs and captured data
• Include the subcontractor in your own safety management system (SMS) processes where appropriate
• Brief subcontractors on any site-specific hazards, NOTAMs or airspace restrictions before each operation