FlyZB speaks sense.
I would add that MAN could also try competing on service rather than on price (there's a novelty eh?) Little Chef recently tried cutting prices to win back business - look what happened.
If people want to fly, a few extra pence off the landing fees (if the airline even passes them on to pax) won't make much difference.
In case you haven't noticed, real inflation (petrol, diesel, gas, potatoes, wheat, local and national taxes) is far higher than RPI or CPI would suggest, and with the recent credit scares, people are tightening their belts. I know I am. Travel suddenly becomes optional not taken for granted, and this will also have an effect on traffic levels at most airports.