Accidents and technical malfunctions put Britain's nuclear deterrent to the test. There have been frequent incidents of disruption of some of the most important British military assets.
The most recent of which was the failure of the Navy to launch a missile from the Trident nuclear deterrent system near the American coast. The aircraft carrier "Prince Wales" is preparing to participate in the ongoing NATO maneuvers near the Norwegian coast, which have been described as the largest since the Cold War. Technical faults in propulsion helicopters may prevent this.