BMI might have decent enough loads but just a cursory glance at tomorrow’s departures shows fares for just £60 the night before! And plenty other dates in the next couple of weeks show that fares are well below the normal BMI going rate on other routes.
Compare that to a route like ABZ-BRS (about 50-60% average monthly load factor) and you’re looking at over £300 o/w on the same date.