A statement from Facebook says female chimp Kay from Paddy's group has passed away "after almost 23 happy years at the park, chimpanzee Kay has passed away. Kay appeared to be suffering from some kind of paralysis to her lower limbs and closer investigation by our veterinary team revealed a large tumour, we were able to remove it and get Kay back to her bedroom in the pavilions but sadly she did not recover and passed away a short time later. "