@Prochilodus246 This didn't occur to me, but then again I do have difficulty telling pure bred giraffes apart from hybrids. There is at least one giraffe being kept separate from the main herd in the old giraffe house on the other end of the site, but I don't know whether it's a hybrid or not.
If I remember from my last visit there were two pure male Kordofans in the old giraffe house. I have noticed at some collections such as Fota Wildlife Park in Ireland had their males separated probably as a means of controlling births.
In regards to telling hybrids from pure individuals. Along with pattern identification I have noticed par a couple of collections they are kept in single sex groups to halt breeding of more impure individuals. Obviously at places like Folly Farm & Edinburgh they are bachelor herds of pure Rothschilds. No UK collection to my knowledge has a mixed sex group of more than one subspecies in a single enclosure.