Direct proof of use
The Cutlass class appears in the 2014 Russia-Ukraine War through Royal Navy operations against Russia's sanctioned shadow-fleet tanker network rather than through Ukrainian tactical operation of the boats. In January 2026, the Royal Navy reported that HMS Dagger monitored the sanctioned tanker Grinch through the Strait of Gibraltar, took photographs, and supported a French boarding operation.
In March 2026, the Royal Navy reported that HMS Cutlass was dispatched to track MV Deyna, report the tanker's movements, and capture imagery for French forces during another operation against a sanctioned Russian oil tanker in the Mediterranean. UK officials linked these operations to efforts to disrupt shadow-fleet oil revenue associated with Russia's war against Ukraine.
Sources: Royal Navy: Dagger monitored tanker Grinch, Royal Navy: Cutlass tracked MV Deyna
Timeline
The public record supports two 2026 Cutlass-class mission milestones tied to shadow-fleet interdiction. HMS Dagger's January tasking provided Strait of Gibraltar monitoring and imagery for the French operation involving Grinch, while HMS Cutlass's March tasking added tracking, movement reporting, and imagery support during the French operation involving MV Deyna.
A 2025 Royal Navy report also documented the Gibraltar Squadron's addition of lightweight camera UAV training for maritime security, reconnaissance, and force-protection missions. That source supports the squadron's broader surveillance context, but it does not by itself document use in a Russia-Ukraine War-linked interdiction.
Sources: Royal Navy: Dagger monitored tanker Grinch, Royal Navy: Cutlass tracked MV Deyna, Royal Navy: Gibraltar Squadron embraces drone technology
Narrative
Cutlass-class use in this conflict is best understood as UK maritime-security support to Ukraine rather than battlefield employment by Ukraine. The Royal Navy Gibraltar Squadron operates HMS Cutlass and HMS Dagger from Gibraltar, where their position allows rapid monitoring of vessels moving through the Strait of Gibraltar and nearby Mediterranean approaches.
The documented 2026 missions involved surveillance, contact tracking, movement reporting, and imagery collection for French forces. The boats did not board the tankers in the cited reports; the French forces carried out the boarding operations, while HMS Dagger and HMS Cutlass supplied monitoring and information from Gibraltar-area patrol operations.
The parent conflict side is recorded as Ukraine because UK ministers described shadow-fleet disruption as a way to reduce oil revenue supporting Russia's invasion and to support Ukraine. The source-backed operator for the Cutlass-class craft in these incidents was the United Kingdom's Royal Navy.
Sources: Royal Navy: Dagger commissioned into the fleet, Royal Navy: Dagger monitored tanker Grinch, Royal Navy: Cutlass tracked MV Deyna, GOV.UK: Defence Secretary on Russian shadow fleet interdiction
