Unfortunately this is most likely a one-off, because the government would never give any money away if Twycross asked them for a grant just for some new enclosures.
The government only wants to be seen giving money to projects they think will help solve aspects of the global crisis, i.e. global warming/ climate change/ pollution/ declining wildlife populations/ deforestation/ poaching etc. What zoos do is conserve and breed captive populations of wild animals as well as contributing to research and in-situ conservation projects. In addition zoos can educate us about these aspects of the global crisis but in reality they cannot solve them.
So Twycross came up with the pseudo-solution idea that is the NSCC to get the money. They misleadingly sold the NSCC (with the help of some copy-and-paste quotes from Attenborough, Thunberg, and Goodall) as something that will help solve the global crisis, when in reality it is just more education and more research - two things that zoos all over the world have already been doing for half a century. A smart dupe it must be said, even though sadly the NSCC won't do anything to impact the global crisis... that is something that governments should be doing.