Originally Posted by
DaveReidUK
Google Earth agrees, there's no way a 9,000 runway could have been shoehorned into the space available.
Unfortunately Wisley closed the year before I was posted to Farnborough otherwise I dare say I would have more knowledge of it's characteristics, so just a guess on my part based on personal observation (flown over it several times) and the amount of runway needed for a loaded Valiant.
They had to build a substantial earthwork at the western end just to get 6,700ft; you can still see it from the A3.
I've amended my previous message.