I think in the current climate the best way to get yourself on the flight deck is to approach a pilot before you get anywhere near the airport.
If its all pre-arranged there a a few bonuses like you can arrive in your Sunday best so other pax don't get annoyed as previously mentioned and also, you don't have to pay
. Of course you need to know a pilot first. Going on from rossco18_uk's post, the pilot who's offered me a ride works for Britannia.
A quick appology to WWW and alike who are likely to be bombarded with requests at the next bash.
Cheers
AF