London Zoo has received its largest ever gift - a mystery £20m donation - from an anonymous benefactor. The Zoological Society of London (ZSL), which manages the zoo and marks its 200th anniversary, plans to introduce a new state-of-the-art animal hospital that allows visitors to watch live veterinary procedures. The new facility will provide advanced veterinary care, scientific research, professional training, and public engagement under one roof. It is also expected to investigate how diseases could spread from animals to humans. Critics have questioned the ethics of keeping wild animals in captivity, while others argue that modern zoos play a vital role in conservation. ZSL maintains that its work is vital for conservation, education and global health.