Just got back from the zoo today, and it was an incredibly enjoyable day. Despite the coach arriving in London an hour and a half late and the hour walk to the zoo, I still managed to see everything in the 5ish hours I had left.
I've got to say, after reading lots of grumblings about London, I was pleasantly surprised. I know some enclosures could do with expanding or demolishing and that some enclosures are a bit on the pokey side, but all the new exhibits are very well designed.
Personal highlights, for me, were seeing some animals for the first time, including African Wild Dogs, Komodo Dragons, Aardvarks and Galapagos Giant Tortoises (which are SO much bigger than I imagined - seeing them on the television or in books really doesn't do them justice).
I particularly enjoyed the aquarium, seeing loads of marine and tropica fish that I sell at work and in some cases keep as pets. I also thought B.U.G.S was class, as was the reptile house.
The new lion cubs were very cute, and one came right up to the window and looked me in the eye. I love it when that happens. The gorilla enclosure was, in my opinion, very impressive, although I know some don't like it. I think, at least, it's an incredible improvement on what they were living in.
I also like what they've done with the old elephant house and the emu and wallaby enclosure is great (however the enclosure really does have much more potential).
It was really really quiet, also, which made for a really peaceful day. However there was several incidents of school kids running amok when being unattended. I gave 'don't do that' glances to them as they 'tried to blind the tortoise with the flash' and slapped the tiger glass window. Some kids were yelling, properly yelling, at a Wild Dog, at which point I gave them the glance and he apologised and told his friends to shut up as well, which I think the Wild Dog appreciated somewhat.
All in all, a very enjoyable day. I took over 300 pictures. xD