Visited yesterday - enjoyed the gloriously unseasonal weather as myself and Hel walked a 10 mile round trip there from the nearest bus-stop along a lovely country lane!
And the animals were enjoying the glorious weather too - I saw everything I aimed to, with the exception of the rusty-spotted cats which are still unfortunately offshow a year after their arrival. Almost everything was basking in the warm and pleasant March(!) sunshine.
The jaguarundi seemed to dislike me - hissed every single time I passed their enclosure

though of course this meant I got some excellent photographs of them. The oncillas, corsac foxes and southern aardwolf were both very active too. The eastern aardwolves were very inactive, but fortunately for me their inactivity was in the middle of their enclosure fast asleep!
All in all, I strongly recommend Hamerton to everyone - it really is worth the extra effort in reaching it, and if you pick a day with good weather the walk required if you don't have your own transport is really nothing

especially if, as we found, the fields of the surrounding area are rife with kestrels, hare, pheasants and red kite!