For four months, the job of guarding NATO’s eastern edge over the Black Sea fell to a handful of British fighters sitting at cockpit readiness in Romania. Last week, they handed the watch to Spain and went home.

On July 31, 2026, Royal Air Force personnel from 121 Expeditionary Air Wing formally handed NATO’s enhanced Air Policing mission in Romania to the Spanish Air and Space Force at a ceremony at 86th Air Base Borcea, closing out the United Kingdom’s Operation Biloxi 2026.

Guarding the eastern flank

The RAF took over the Romanian air policing role from a departing German Eurofighter detachment and spent four months flying Quick Reaction Alert alongside the Romanian Air Force. Eurofighter Typhoon FGR4s from 3 (Fighter) Squadron stood ready around the clock to identify, shadow and, if needed, intercept any aircraft approaching NATO airspace — the day-to-day reality of deterrence on the Alliance’s eastern flank.

The numbers tell the story of a busy tour. Over the deployment, the detachment launched 49 Quick Reaction Alert scrambles: seven live “Alpha” scrambles against unidentified aircraft and 42 training “Tango” scrambles, while holding more than 1,500 hours at very high readiness.

A relay that never stops

Beyond QRA, the British detachment trained hard with allies, flying air interdiction and close air support work with NATO Joint Terminal Attack Controllers on Exercise Beastling Monolith and joining the wider Exercise Neptune Strike, working with personnel from eight NATO nations. The UK has been a regular contributor to Romanian air policing since 2014.

Now the baton passes to Spain. That is the point of NATO air policing: it is a relay, not a sprint. One nation’s jets stand down, another’s take over, and the alert lines on the eastern flank never go dark.

Sources: Royal Air Force, NATO Allied Air Command, Forces News, defence-industry.eu.