a. They were traded to circuses, renowned for unsuitable conditions.
b. It was operated by Jimmy Chipperfield, a man seemingly more interested in his paying public then his animal's welfare.
I wasn't there myself, but someone I know who was at the unveiling of Marwell's ice rink in 2007 said Chris Packham, who was there to open it, recalled childhood memories of visiting Southampton as a child being completely unaware of just how bad the conditions were as he hadn't grasped the concept at that age. Likewise, the person who told me about this had exactly the same thoughts as a child.