What does the term "fast-jet" refer to in the context of RAF aircraft?

The term "fast-jet" in the context of RAF aircraft specifically refers to high-speed, high-performance fighter aircraft. These jets are engineered for rapid responses in combat scenarios and typically feature advanced aerodynamics and powerful engines, enabling them to execute complex maneuvers and engage in air-to-air and ground-attack missions effectively.

This designation emphasizes both speed and performance, attributes central to the roles that fighter aircraft fulfill in military operations. Unlike other aircraft types, such as lightweight training aircraft, helicopters, or transport aircraft, fast-jets are primarily designed for combat, highlighting their capability to operate at high speeds while maintaining agility and operational effectiveness in various mission profiles.