The UK’s UAS regulatory landscape was remade on 1 January 2021, when the post-Brexit UAS Regulatory Package—derived from retained EU law and the Air Navigation Order 2016, and guided by CAP722—replaced the prior ANO-based rules. What followed was a gradual divergence from EASA: in December 2022, the CAA formally ended automatic equivalence between EU C-class marks and UK class marks. Legacy transition provisions softened that break until 1 January 2026, when a full UK class-mark mandate took effect simultaneously with updated registration thresholds and Remote ID requirements. What follows is how the framework actually works today.

Three Tiers, One Hierarchy

All UK UAS operations sort into three mutually exclusive categories. Open covers low-risk activities requiring no CAA authorisation—most hobby flying and a substantial portion of low-risk commercial work fits here. Specific covers operations that exceed Open Category limits and require a CAA Operational Authorisation (OA). Certified handles complex, high-risk operations under rules that mirror manned aviation: type-certified aircraft, a licensed remote pilot, an approved operator. The Certified Category requires a type-certified aircraft, a licensed remote pilot, and an approved operator, mirroring the standards of manned aviation. In practice, Certified is rare; it exists for cargo operations and complex crewed-airspace integration, not the photography and inspection work that dominates commercial operations.

Within the Open Category, three subcategories determine where a drone can fly and how close it can operate near people.

A1 — “Over People” applies to drones under 250 g with no class mark, or to aircraft carrying UK0, UK1, C0, or C1 class marks. A1 permits flight over uninvolved people but never over open-air assemblies or crowds, with VLOS required throughout. The headline change enabled by the UK1 class mark: drones up to 900 g now qualify for A1, where previously the practical ceiling was 250 g.

A2 — “Near People” requires a UK2 or C2 class mark (or a legacy sub-2 kg drone operating under pre-class-mark rules), plus an A2 Certificate of Competency (A2 CofC). Standard horizontal separation from uninvolved people is 30 m, reducible to 5 m in low-speed mode for UK2/C2-class aircraft.

A3 — “Far from People” covers UK2, UK3, and UK4-class drones, privately built aircraft under 25 kg, and pre-2026 legacy models under 25 kg. Minimum separation is 50 m from uninvolved people; operations must additionally stay at least 150 m from residential, recreational, commercial, and industrial areas and at least 50 m from individual buildings.

All three subcategories share a universal ceiling of 120 m AGL (400 ft), a hard VLOS requirement—BVLOS is not permitted anywhere in the Open Category—and, since the January 2026 update cycle, a requirement for a green flashing light during any night operation.

Registration: Two IDs, Two Thresholds

Before a pilot puts almost any drone outdoors in the UK, two credentials are in play. The CAA is unambiguous on the legal stakes: “It is against the law to fly a drone or model aircraft without having the required IDs.”

The Flyer ID is obtained by passing a free online theory test administered by the CAA, valid for five years and must be retaken to renew. Children under 13 can register, but the CAA requires they take the test with a parent or guardian “for data protection reasons.” The Operator ID costs £12.34 per year, is valid for one year, and requires the registrant to be at least 18; one ID covers an entire fleet. If the drone owner is under 18, a parent or another adult must register as Operator. The Operator ID must appear on the drone’s exterior in block capitals at least 3 mm high, visible or easily accessible.

The weight thresholds triggering each requirement shifted materially on 1 January 2026:

  • 250 g or more: both Flyer ID and Operator ID required.
  • 100 g to under 250 g with a camera: both required.
  • 100 g to under 250 g without a camera: Flyer ID required; Operator ID optional.
  • Under 100 g: no Flyer ID legally required, though the CAA recommends taking the test regardless.

The expansion of the Flyer ID threshold from 250 g down to 100 g was the most operationally significant change for the mass market—an estimated 500,000 UK pilots who owned sub-250 g camera drones found themselves newly in scope.

UK Class Marks, the EU Transition Window, and Remote ID

“A class mark is a label applied by the manufacturer to show that the aircraft meets specific regulatory requirements.” — FPVUK

From 1 January 2026, every new drone or model aircraft placed on the UK market must carry a UK class mark. The full range of marks and their subcategory placements:

  • UK0: under 250 g — Open A1
  • UK1: under 900 g — Open A1
  • UK2: under 4 kg — Open A2 or A3
  • UK3: under 25 kg — Open A3
  • UK4: under 25 kg — Open A3
  • UK5: under 25 kg — Specific Category only
  • UK6: under 25 kg — Specific Category only

The UK2 class mark also expands what A2 CofC holders can legally fly near people: drones up to 4 kg now qualify under A2, where the previous limit was 2 kg. UK5 and UK6 place aircraft directly into the Specific Category, requiring a CAA OA regardless of the operation’s apparent simplicity.

EU C-marked drones already in circulation—C0 through C4—are recognised as equivalent UK classes (C0 ≈ UK0, C1 ≈ UK1, C2 ≈ UK2, C3 ≈ UK3, C4 ≈ UK4) until 31 December 2027. After that date they become “legacy aircraft,” placed by weight rather than class mark: under 250 g into A1 only, everything else into A3 only. Drones without any class mark follow the same weight-based placement today.

Remote ID rolls out in two phases alongside the class-mark transition. Since 1 January 2026, Remote ID—a broadcast of a unique identifier via Wi-Fi or Bluetooth—is mandatory on UK1, UK2, UK3, UK5, and UK6 class drones. A second phase from 1 January 2028 extends the mandate to UK4-class drones, legacy drones 100 g and above, privately built aircraft, and UK0 drones with cameras. One operational note: the final three characters of any Remote ID number constitute a private key that must never be written on the aircraft or shared.

The Specific Category: PDRA01, UK SORA, and BVLOS

When an operation cannot be contained within the Open Category—BVLOS, above 120 m, flights over crowds, item drops, swarm missions, or complex environments—the pilot must obtain a CAA Operational Authorisation. Two pathways exist.

PDRA01 is the lighter-touch route: a Pre-Defined Risk Assessment that covers defined operational scenarios. It requires a valid OA from the CAA but does not require pilots to construct a bespoke risk assessment from scratch.

UK SORA is the full Specific Operations Risk Assessment process, covering everything PDRA01 does not: BVLOS, above 120 m, swarms, item dropping, and other non-standard operations. It requires the appropriate remote pilot competency certification, plus a detailed risk assessment submitted to the CAA. UK SORA replaced the Operational Safety Case (OSC) methodology in 2025.

A handful of edge cases apply across both categories. FPV flying is legal in the UK. Pilots who hold UK qualifications and wish to fly in EU member states must obtain EU-equivalent certification separately; recognition of UK GVCs and Operational Authorisations varies by country, a direct consequence of post-Brexit regulatory divergence.

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