From what I know (feel free to correct me, I've only just come back), the reasons Thorpe have deemed a Wooden Coaster inappropriate stand thus:A) The support structures are too dense. This means if you tried to look through the supports your view is noticeably impaired, whereas the slender, steel supports of Nemesis Inferno, Stealth, Colossus, and SAW - The Ride allow maximum visibilty when looking through the coaster and it's supports because they are 'minimal' compared to the complex structure of a Wooden Coaster.B ) Thorpe Park is built on reclaimed land, meaning it was not a naturally occuring isolated land mass surrounded by lakes - the lakes are artificial because back in 1976-1978, RMC re-claimed the land for infilling, but decided it would be cheaper to just flood the surroundings. Because of RMC's laziness, the land is particularly unstable as the water table is very high, and if a heavy, complex structure like a Wooden Coaster's extensive support system was to be placed on the new infills, the land would not be able to support the weight. Thorpe's best bet to overcome this is to build a Wooden Coaster where an existing ride is, so to ensure the land it's built on is settled, and has been there for 10+ years. But this still doesn't solve the issue of support density.C) A pretty petty excuse, but I believe Runnymede deemed a Wooden Coaster too noisy if it were placed on an exposed extremity of Thorpe (รก la Treasure Island). I think they requested new trees to be planted to diminish the sound for SAW - The Ride as the noise would travel too easily into the neighbouring villages.Funny thing is, Thorpe claim that re-planting trees is their way of giving back to the environment what they took, but odd's are they re-plant the trees because Runnymede told them to.Hope that clears things up, much as I'd like a Wooden Coaster, the negative impacts combined are enough for Runnymede to just snort at the idea.