How can it be irrelevant.....all those aircraft are parked on BAA concrete and paying top price parking rates.
These aircraft mainly come in and sit up for days or weeks sometimes months and they are mainly big jets, and this is all revenue for the BAA no outlay just pure revenue, they would earn a lot more having a B747 sitting on the tarmac there than a load of cars.
My point earlier was purely to tell you that people do want to use Stansted it wasn't about airport growth.