The BA terminology makes the distinction between "Economy" and "Club" (instead of "Business"). Other carriers create a distorted perception that their "CE/CW" cabins should thus be filled with business people having their fares paid by their employer, whilst "ET/WT/WT+" are filled with aspirational tourists seeking a step up from LoCo travel.

I suspect the ratio of business/leisure in the various cabins is significantly skewed from that perception.