Luton Take Off
All terribly interesting, but is "hadagutful" getting confused between the alpha or bravo intersections with the runway and the charlie intersection ??? (wot is how this thread was started by DeepC).
There is a hell of a lot of difference. From Alpha or Bravo you maybe give away a couple of hundred metres (of the 10,500 feet or so) whereas I would agree nobody (except me in a Warrior) is going to take off from Charlie which would lose you 4,000 - 6,000 of runway.
Having said that, the last time I was on an Easy 737 on 26 from Alpha we rotated at charlie, which (not having my Jeppesson to hand) is about 4,000 ft.