Assuming you are asking about military jets operated by the United Kingdom’s Royal Air Force (RAF), here are some examples:
Eurofighter Typhoon – a multirole fighter aircraft used for air-to-air and air-to-ground missions. Lockheed Martin F-35 Lightning II – a stealthy, fifth-generation fighter aircraft used for air-to-ground and air-to-air missions.
Panavia Tornado – a twin-engine, variable-sweep wing combat aircraft used for ground attack and air defence missions. Boeing E-3D Sentry – an airborne warning and control system (AWACS) aircraft used for surveillance and command and control missions.
Airbus A400M Atlas – a tactical airlifter used for transporting personnel and cargo, as well as airdropping supplies and equipment.
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