Well, you may be right, but I am sure a local Buckingham firm would collect for around that - remember it is only use Londoners who tolerate being ripped off!

I suggest you call Buckingham Car Hire, Buckingham, Tel: +44 (0)1280 812038 just asked about a collection from Terminal 4 and they quoted GBP75, with around GBP10 for parking on top of that, obviously no parking charge of they just drop you off on your return journey. Man who answered phone was not terribly helpful though.......