The enclosures on the left hold monkeys. The one at the front has miniature horses. Out of shot on the right are the model dinosaurs. The height and robust construction of the central pillars suggest that these enclosures are designed to hold a large species which likes to climb, as I wrote in the Wingham Forum.
Looking at the photo that could surely only mean orangutan, if the speculation is correct. Does anywhere in Europe have surplus?
(another thing to think about would be Wingham's willingness to import from outside Europe)