There were only two animals in the paddock and only two name labels. That said, I didn't actually go in the house (though I did peek in the windows for a quick scan) so it's not impossible there was a third animal.
With Giraffe in many cases hybrids and purebreds are very difficult to differentiate by coat pattern- even the distinctive 'network' pattern of the Reticulated can appear in crossbreds too. Whipsnade's are pure though(AFAIK).
Three options here; Its possible they still have the younger of 'Savanah's sons by the previous bull. Or the listing is outdated and he has now left Whipsnade. Or it could be a new male...
There are 'blind' areas in that Giraffe House- its fairly possible for an animal to be standing out of sight from some angles and even if you go inside there are bits you can't see well. I always go in Giraffe Houses though because of the smell...
I think the ISIS listing of 1.2 may well be outdated and refer to the last male offspring (Savanah/Bruno), which may/or not have left the Park by now.
