Try varying your contact address A380.
I know my company sort the CV's into piles around each base then when they require more crew at a base they get the pile out.
So if you have a relative near one of the bases of the company your applying to use it instead of your London one.
Also I have heard some regional err shall we say bigotry against people from the big smoke due to people in the past not making the change to living in the sticks.
I am sure some people will say I am talking bollocks but anything is worth a try.
MJ