Suggest you contact B Ecclestone - I'm sure you'll find him sympathetic to your plight if you continue the same tone used here. On Bernie's "to do" list you'll appear somewhere near to "must sort chemical toilets for camp site."
Very doubtful whether Silverstone or Heli Air would have been told the 2011 detail yet. You see there's this Championship going on and it isn't over yet.
My limited info says that the main heliport as used this year, the one with a proper control tower, will still be used in 11.
However, if you can get Bernie's mobile number, call him about 4am UK time on Sunday. If you get voicemail, make sure you speak your name and number clearly. His hearing isn't what it used to be.