WW, I appreciate that holds true for some/many routes. But if, for example, RwandAir moves from Lgw to Lhr, why would they suddenly benefit from higher yield? They are the only carrier to operate direct to Kigali from London, so if you want to go there direct, they are the only option, so it should not matter whether it is Lgw or Lhr. Other than the ability of Lhr to operate almost in a monopoly position on LH routes(it looks like they are going to get almost 100% control again), why else would yield go up in the example I have given and there are others?