By the time the Brabazon came to market, there were no shortage of competitive offerings available: the Douglas DC-6, the Boeing 377, the Lockheed Constellation

By the time the Brabazon came to market, there were no shortage of competitive offerings available: the Douglas DC-6, the Boeing 377, the Lockheed Constellation, for instance. These could all haul at least 2 times as many passengers over comparable ranges at significantly higher cruising speeds. And you wouldn't have to wait for Bristol to refit the Brabazon, you could buy any of those planes right away. The idea of luxury accommodation for a small number of passengers was really the only "unique selling point" the Brabazon had going for it. Once it became clear nobody actually wanted that, it was just a plane that was worse at doing the things people did want than all of its competition.