North East:
As of yet I have not been round any of the zoos in the area although technically I have been to one: Kirkley Hall Zoo. I went on a day it was closed, which was not specified and the doors were wide open. I only managed to see a couple of enclosure before the cleaner informed me the zoo was indeed closed.
North West:
This will likely be a very popular consensus but Chester every day. Arguably the best zoo in the UK with a large and varied species inventory, new enclosures and developments always in the works. What's not to love about it?
Yorkshire & The Humber:
Although Yorkshire has many (more than I thought to be frank) collections, Yorkshire Wildlife Park takes it. A relatively new collection that has expanded greatly since it only being a small farm park less than 20 years ago. A great array of large mammal species set within expansive enclosures. However, personally the only thing letting the collection down is the lack of birds, herps and well anything that pretty much isn't a large and impressive ABC mammal.
East Midlands:
I have only visited two zoos within the area and that is Twycross & Peak Wildlife Park. Both in my personal opinion are nothing spectacular and although were a good day out I won't be rushing back. I personally found Peak too petting zoo esq (I visited before the polar bears arrived

) but with recent arrivals of larger species I'd be excited to see how the collection changes with me seeing a very similar situation to Yorkshire WP potentially occurring. Twycross I found quite unloved (although some parts I particularly enjoyed) and lots of enclosures under refurbishment with not a great deal to see. I'm optimistic with the recent developments that Twycross will only get better.
West Midlands:
I am still yet to visit this area for zoos so I cannot possibly comment although on my radar for visiting are Dudley, WMSP & Birmingham SeaLife.
East of England:
Again, not an area I've visited much but the cake goes to Hamerton. A small collection but incredibly diverse in terms of species particularly ones from down under.
London:
ZSL London Zoo of course. I throughly enjoyed my first visit last spring. Although the collection is a shadow of its former self in terms of species, I still found the collection strong although not without a few flaws. I feel the space in Regent's Park should be utilized fully to make use of the small space the zoo inhabits.
South East:
Whipsnade Zoo takes it given it is one of very few collections I have actually been to down there. The collection ticks the boxes for all sorts of different species on show. I do feel however, many of the birds that sit BTS, with the occasional outings for the species in the show should be brought on show, maybe in the construction of a large walkthrough aviary?
South West:
Personally, it has to be either Exmoor or Newquay Zoo. My visits this spring and autumn 2022 respectively were both throughly enjoyable and both had such interesting arrays of species. I do seem to enjoy my visits to smaller species rich collections far more than larger collections.