The entrance is pretty hard to find, even with all the signs; I practically walked the whole way round before finding the entrance! I guess this is a hang-over from when the collection was free to enter (they only started charging last year I think)
@sooty mangabey it was an ok little zoo, but very much at the petting/farm end of the scale. For small city zoo, think I preferred Battersea Park to Hanwell, although the cranes and flamingos here are a nice touch. There were too many empty and underused enclosures at Hanwell, (there didn't seem to be any lemurs in their enclosure, and the hornbill aviary was very bare), however the flamingos seem to be a recent addition if the news thread is correct, so maybe they're working on building the collection.
I hate to say a zoo isn't worth visiting, but this one maybe needs time to grow a little before its worth a long journey. I have a season ticket for the train line that stops at Hanwell, so the trip for me was essentially free, bar the £2.50 zoo entrance fee. I was there for about an hour, which is probably the most time you can spend there, but then I did spend some time with the budgies
As awful as this particular entrance appears to be, it simply must bow down to the Capital of Texas Zoo's entrance...because at that tiny zoo in Texas visitors have to honk their horn to notify the owner that they have arrived!