Capability statement.
Issue 01 / Q2 2026. The working document for evaluators, integrators, and partners.
At a glance.
UK-based engineering lab. Founded 2024. Active R&D. Two programmes in prototype, one open.
Repair-forward. Governed claims. Documentation as deliverable. Constraint-first design.
Keystone 25 / modular carry platform / REV A03 Sentinel HMD-1 / head-mounted compute and HUD / REV B01 Programme 03 / open for collaboration
Conversational. Four channels: technical, partnership, press, general. Evaluation cohorts open as programmes mature.
UK-based. UK-designed and prototyped. Working toward Cyber Essentials Plus, JOSCAR, ISO 9001. Posture published openly, updated quarterly.
UKDI Innovation Partners and Dstl evaluators. Prime contractor engineering and innovation teams. Specialist operators and procurement leads. Expedition, SAR, and industrial users.
Doctrine.
Failures are designed for, not designed around. Every fastener on a Flatline module is replaceable in the field with one tool. Spares specifications are published, not proprietary.
A Flatline module that fails at hour 96 in cold weather should be back in service before hour 100, with parts the user already carries.
The lab publishes only what it can demonstrate. Specifications reflect what is measured at current revision, not what is targeted for the next revision. Roadmap items are labelled as such.
A buyer evaluating a Flatline programme can assume the published spec is the floor, not the ceiling.
Service manuals, decision logs, spares specifications, and design rationale are produced in parallel with engineering, not after it.
An integrator handed a Flatline module receives the same documentation depth that the lab itself uses to service it.
Every design decision starts from the operating envelope: temperature, vibration, abrasion, time to repair, available tools. Features are added only if the constraints permit them.
Flatline programmes tend to look spare. Nothing on the module is there because it could be, only because it must be.
Current programmes.
Modular carry platform, approx. 25L
Modular carry platforms in the 20-30L class are typically built around proprietary hardware systems, layered access patterns that resist field repair, and spares chains tied to single manufacturers. Field-level service is treated as out of scope.
Open-spec buckles, sliders, cord-locks throughout. 25mm UK MIL-spec webbing primary. Large-gauge standard YKK zips with full storm flaps. Full clamshell access for service.
Head-mounted compute and HUD platform
Head-mounted display systems for dismounted operators have historically required multiple cables, tethered power, and integration with vendor-specific helmet platforms. Cable management under NVGs is operationally hostile.
Single USB-C tether to backpack-worn battery and Pi 5 (8GB) compute. Amber monochrome HUD optimised for dark adaptation. Sensor pack: IR illuminators, GPS, compass, LoRa, ATAK telemetry via Android gateway.
Compliance posture.
Channels.
Engineering questions, system specifics, doctrine.
Collaboration, supply chain, integration, manufacturing.
Journalists, press kit, interview requests.
Anything that doesn't fit the other three.
The discipline is the product. The hardware is how we demonstrate it.
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