Just to draw your attention to the aerial map in this link...http://www.bing.com/maps/default.aspx?v=2&cp=51.403675%7E-0.515153&style=h&lvl=17&sp=aN.51.403675_-0.515153_Thorpe%20Park#
This was relatively recently taken (around October/November 2011) as you can see by The Swarm midway through construction. If you look at the old farm you can see how they have created channels on the old sheep fields and flooded them, to compensate for infilling the land for The Swarm and the island behind it. Interestingly, they are no longer two islands but one large one, but I presume this is a temporary measure to allow access for construction vehicles.
More interestingly, you can see how they have cleared the land over the other side of the lake, which looks ripe for development of the new hotel. It's amazing to see how much land Thorpe Park actually own which ISN'T lake, enough to build half a dozen hotels if they so desired....
What you think of the idea of a thrill water park being built to the left of the hotel within the next decade?