Yup, thats the field
In the 5 years I've been at Gatwick, I've seen it used about 4 times. I believe its use is very restricted and only through loads of red tape. The approach is flown from the north, over Povey Cross on a right base. Then turn short final and dip below the trees, out of sight of the tower.
Due to the politics involved, we treat the aircraft as an overflight and our only responsibility is to provide traffic information and a wind check. (I may be wrong, but I think it can only be used when we are on 26.)
Its quite a sight to see that close to LGW, and even stranger to see it dip below the tree line
