While studies were performed and considered, such as a stretched twin-engine of the Hawker Siddeley Trident and an expanded development of the British Aircraft Corporation BAC One-Eleven designated the BAC Two-Eleven, it was recognized that if each of the European manufacturers were to launch quite similar aircraft onto the market at the same time, none of them would achieve the volume sales needed to make them viable.
Mentres se realizaban e consideraban estudios, como unha versión alongada e de dous motores do Hawker Siddeley Trident e un desenvolvemento ampliado do BAC One-Eleven designado BAC Two-Eleven, recoñeceuse que se cada un dos fabricantes europeos lanzaban avións semellantes ao mercado ao mesmo tempo ningún deles alcanzaría o volume de vendas necesario para facelo viable.