OSC to UK SORA Transition Pack: a Clear, Affordable Regulatory Pack for OSC Holders
Up to 3 ground risk mitigation points, under SAIL2. Training+ SORA Operations Manual extracts or template + compliance matrices. Regulations made accessible.
OSC renewals close on 31 December 2026
If you hold an Operating Safety Case (OSC) based Operational Authorisation, the CAA has confirmed that 31 December 2026 is the last day to submit an OSC renewal. After that, continuing your Specific Category operations means applying under UK SORA, which replaced the OSC route on 23 April 2025.
UK SORA is more structured than the OSC, and preserving your current operating scope is not always straightforward. Our OSC to UK SORA transition pack provides the training, Operations Manual sections and compliance matrices to make the move with a defined scope and a known cost. It draws on our experience supporting several successful UK SORA applications.
Why OSC privileges do not transfer automatically
Roughly 70% of OSC authorisations rely on reduced distances from uninvolved people. That concept does not exist under UK SORA. Ground risk to uninvolved people is instead assessed through the intrinsic Ground Risk Class (iGRC) and reduced through defined mitigations.
Unless an operation is re-argued in those terms, privileges held today may not survive the transition. The pack is designed to close that gap.
What does the UK SORA transition require?
An OSC demonstrated safety through the operator's own safety case. UK SORA asks for the same assurance in a fixed structure, assessed step by step:
Ground risk: an intrinsic Ground Risk Class, reduced by mitigations M1A, M1B and M1C, each claimed at a stated robustness.
Air risk: an initial Air Risk Class, reduced where possible by strategic mitigations to a residual ARC, with Tactical Mitigation Performance Requirements where applicable.
Containment: a demonstration that the aircraft stays within its operational volume and ground risk buffer, at the robustness the assessment requires.
SAIL and OSOs: a Specific Assurance and Integrity Level, which sets the Operational Safety Objectives to meet and the robustness required for each.
Evidence: for every claim, an integrity statement (what you do) and an assurance statement (how you show it).
Much of what an OSC holder already does should satisfy these requirements. What changes is how it is argued and documented: restating it in UK SORA terms, closing the gaps, and presenting it so an assessor can trace each requirement to its evidence.
The OSC to UK SORA transition pack
The pack combines training with ready-to-adapt documentation. It covers the elements most OSC holders need for a SAIL I or SAIL II application.
Module | What you receive | Scope |
UK SORA Transition Workshop | Half-day session, online or in person | The UK SORA methodology step by step, with worked illustrations |
Ground risk mitigations | Operations Manual sections and GRC mitigation compliance matrix | Up to three ground risk reduction points without necessarily adding a parachute, supporting urban operations at SAIL II: M1(A) at Low, M1(B) at Medium and M1(C) at Low robustness |
Containment | Operations Manual sections and containment compliance matrix | Low robustness |
Operational Safety Objectives | Operations Manual sections and OSO compliance matrix | SAIL I and SAIL II |
The Operations Manual sections are written as operator-ready text.
Each compliance matrix maps a UK SORA requirement to the section of your manual that meets it and the evidence that supports it.
The result is an application an assessor can follow, and a manual your team can work to.
Beyond the pack: Medium robustness containment
Containment at Medium robustness is not included in the pack. The argument depends closely on the aircraft, its failure modes and the operational volume, and does not lend itself to standard text. We provide it as dedicated consultancy, and have supported successful application at this level.
Beyond the pack: BVLOS in Atypical Air Environment
Atypical is not included in the pack. The argument depends closely on the location(s), the aircraft, and does not lend itself to standard text. We provide it as dedicated consultancy, and have supported successful application at this level.
Affordable clarity from The Drone Office
Most operators do not need, or wish for, open-ended consultancy to move from OSC to UK SORA. They need a clear understanding of the method and documentation that already speaks its language. The pack provides both, with a defined scope and defined deliverables, so the cost is known before work starts.
The Drone Office specialises in SORA compliance, BVLOS operations and UAS assurance, working with the JARUS and EASA versions of SORA and the CAA's implementation of it. We also hold an active role with ARPAS-UK, which keeps our work close to how the transition is being discussed between industry and the regulator.
Start early and protect your operation
Check the expiry date of your current OSC-based authorisation now. Early preparation reduces approval risk, minimises delays and gives greater confidence that valuable operational privileges can be preserved.
Frequently asked questions
When is the deadline to renew an OSC-based operational authorisation? The CAA has informed OSC holders that 31 December 2026 is the last day to submit an OSC renewal.
Is my current OSC authorisation still valid? Yes. An OSC-based authorisation remains valid until its expiry date, and variations can be made until then.
Can I keep my reduced distances from uninvolved people under UK SORA? Not as such. UK SORA has no equivalent concept; the same operation must be justified through the Ground Risk Class and ground risk mitigations.
Do I need a parachute to stay at SAIL II in an urban environment? Not necessarily. M1(A), M1(B) and M1(C) can together provide up to three ground risk reduction points, depending on the operation.
Does UK SORA affect PDRA-01 holders? No. The CAA has stated that PDRA-01 authorisations are not affected by the introduction of UK SORA.
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