"The transport secretary who finally killed it just happened to be related to a senior figure at RHS Wisley, a significant objector."
Perhaps the same reason that Wisley was not chosen as London's new business aviation airfield instead of Farnborough way back in the early 1980's. Wisley with a few very expensive houses around it and Farnborough with a westerly approach right over the top of hundreds of "ordinary" people ......