It has naff all to do with Aldergrove, this is one of the great mysteries that I genuinely cannot get my head around when it comes to Harbour. By the same token Harbour has naff all to do with any business decisions away in the distance at Aldergrove.
First of all I will say that you lot may metaphorically tear lumps out of each other over which airport is better. I have no interest .
In terms of why BFS should complain,perhaps if we use the supermarket analogy.
TESCO opens in e.g. Ballyclare . Sainsbury decide they would like to open next door .
TESCO will most likely (publicly at least) welcome the competition,but,they will certainly object to the proposed development.
Would they be wrong to object? If they ARE wrong,why are they wrong?
In terms of Northern Ireland the Belfast area airports are (in terms of our mythical supermarkets) right next door to each other. Why shouldn't they publicly welcome competition whilst doing everything in their power to smother it?