Pain in the R's
What is wrong with the taxiways? I know some of them are not the standard width, which is a bit like the runway, so can't be used by the Airbus but is that it?
Rumour was some of the taxiways have started to "crumble", and by making the "heavys" use Alpha taxiway only they can prolong the life of the rest. I'm sure someone on here will have a more accurate answer though!