As we know when going to London there are two zoos you have options of going to, the nearby London Zoo in Regents Park and Whipsnade Zoo which takes about almost an hour to drive to from London. Because of this in terms of Whipsnade Zoo, there's no way of getting there unless you rented a car, which is why I think it's time an alternate method were to be come up with, what that is would be a trainline to take from London to get to the location of Whipsnade Zoo, after that there'd be some convenient walking distance from there, if not then you could take an uber or a taxi to reach the destination. Both London Zoo and Whipsnade Zoo as we know are associated with ZSL standing for Zoological Society of London, to which point both of them should be London associated in some way.