What I am surprised by is that of your 95 UK collections you have 43 I haven't been to, but I have well over a hundred! I have never been to a zoo in England either the Lake District or North of Flamingoland to the east though which may explain itHaving returned from a lengthy trip around Europe, and with further zoological collections added earlier this year, my list requires an update; new additions in italics, as usual:
Collections visited as of 19/09/2022: 177
Austria: 8 collections
Blumengärten Hirschstetten (first visited 2022)
Haus der Natur (first visited 2022)
Haus des Meeres (first visited 2022)
Innsbruck Alpenzoo (first visited 2015)
Tiergarten Hellbrunn (first visited 2022)
Tiergarten Schönbrunn (first visited 2022)
Welt der Gifte (first visited 2022)
Wustenhaus Schönbrunn (first visited 2022)
Belgium: 4 collections
Pairi Daiza (first visited 2019)
Serpentarium Blankerberge (first visited 2019)
Zoo Antwerp (first visited 2018)
Zoo Planckendael (first visited 2019)
Croatia: 1 collection
Zoo Zagreb (first visited 2022)
Czech Republic: 11 collections
AkvaTera Plzen (first visited 2017)
Krokodýlí Zoo Praha (first visited 2017)
Prague Zoo (first visited 2017)
Zoo Brno (first visited 2019)
Zoo Dvůr Králové (first visited 2019)
Zoo Hluboká (first visited 2022)
Zoo Jihlava (first visited 2017)
Zoo Ostrava (first visited 2019)
Zoo Plzen (first visited 2017)
Zoopark Chomutov (first visited 2017)
Zoopark Zájezd (first visited 2022)
Germany: 37 collections
Aachener Tierpark (first visited 2018)
AquaDom & SEALIFE Berlin (first visited 2018)
Aquazoo Dusseldorf (first visited 2018)
Biosphäre Potsdam (first visited 2018)
Erlenbis-Zoo Hannover (first visited 2016)
Klimahaus Bremerhavn (first visited 2016)
Planten un Blomen (first visited 2016)
TerraZoo Rheinberg (first visited 2018)
Tiergarten Nurnberg (first visited 2015)
Tiergarten Schönebeck (first visited 2018)
Tierpark Berlin (first visited 2014)
Tierpark Chemnitz (first visited 2018)
Tierpark Hagenbeck (first visited 2016)
Tierpark Hellabrunn (first visited 2015)
Tropen-Aquarium Hagenbeck (first visited 2016)
Vogelpark Niendorf (first visited 2016)
Vogelpark Olching (first visited 2015)
Weltvogelpark Walsrode (first visited 2016)
Wildgehege Klovensteen (first visited 2016)
Wildpark Connewitz (first visited 2018)
Wildpark Grafenberger Wald (first visited 2018)
Wildpark Schwartze-Berge (first visited 2016)
Wilhelma (first visited 2015)
Zoo am Meer (first visited 2016)
Zoo-Aquarium Berlin (first visited 2014)
Zoo Augsburg (first visited 2015)
Zoo Berlin (first visited 2014)
Zoo Dortmund (first visited 2018)
Zoo Dresden (first visited 2018)
Zoo Duisburg (first visited 2018)
Zoo Frankfurt (first visited 2018)
Zoo Halle (first visited 2018)
Zoo Köln (first visited 2018)
Zoo Krefeld (first visited 2018)
Zoo Leipzig (first visited 2014)
Zoo Magdeburg (first visited 2014)
Zoo Wuppertal (first visited 2018)
Hungary: 1 collection
Budapest Zoo & Botanical Garden (first visited 2022)
Italy: 1 collection
Naturmuseum Südtirol (first visited 2022)
Netherlands: 6 collections
BestZoo (first visited 2018)
Burger's Zoo (first visited 2018)
Dierenpark Amersfoort (first visited 2018)
Dierenpark Zie-Zoo (first visited 2018)
Diergaarde Blijdorp (first visited 2018)
Natura Artis Magistra (first visited 2018)
Poland: 4 collections
Nowe Zoo Poznan (first visited 2019)
Stare Zoo Poznan (first visited 2019)
Zoo Warsaw (first visited 2019)
Zoo Wroclaw (first visited 2019)
Portugal: 2 collections
Jardim Zoologico de Lisboa (first visited 2019)
Oceanário de Lisboa (first visited 2019)
Slovakia: 1 collection
Zoo Bratislava (first visited 2022)
Spain: 6 collections
Aquàrium de Barcelona (first visited 2019)
Bioparc Valencia (first visited 2019)
Faunia (first visited 2019)
L'Oceanogràfic (first visited 2019)
Parc Zoològic de Barcelona (first visited 2019)
Zoo Aquarium de Madrid (first visited 2019)
United Kingdom: 95 collections
Amazon World Zoo Park (first visited 2013)
Aquarium of the Lakes (first visited 2015)
Axe Valley Wildlife Park (first visited 2021)
Battersea Park Children's Zoo (first visited 2017)
Birdland Park and Gardens (first visited 2013)
Birmingham Wildlife Conservation Park (first visited 2011)
Blackbrook Zoo (first visited 2013)
Blackpool Zoo (first visited 2011)
Bluereef Tynemouth (first visited 2009)
Bristol Zoo (first visited 2011)
Butterfly World Stockton (first visited c.1999)
Calderglen Zoo (first visited 2022)
Cedars Nature Centre (first visited 2017)
Chester Cathedral Falconry (first visited 2017)
Chester Zoo (first visited 2010)
Chestnut Centre Otter, Owl and Wildlife Park (first visited 2011)
Colchester Zoo (first visited 2013)
Cotswold Falconry Centre (first visited 2014)
Cotswold Wildlife Park (first visited 2013)
Crocodiles of the World - original site (first visited 2013)
Crocodiles of the World - new site (first visited 2014)
Deep Sea World (first visited 2022)
Dudley Zoo (first visited 2011)
East Park Animal Centre (first visited 2017)
Edinburgh Zoo (first visited 2010)
Exmoor Zoo (first visited 2013)
Falconry Days (first visited 2013)
Five Sisters Zoo Park (first visited 2012)
Flamingo Land (first visited c.1992)
Galloway Wildlife Conservation Park (first visited 2012)
Gentleshaw Wildlife Centre (first visited 2013)
Hagley Falconry Centre (first visited 2015)
Hamerton Zoo (first visited 2011)
Hawk Conservancy Trust (first visited 2015)
Heythrop Zoo (first visited 2014)
Highland Wildlife Park (first visited 1989)
Howletts Wild Animal Park (first visited 2012)
ICBP Duncombe Park (first visited 2015)
Jesmond Dene Pets Corner (first visited 2015)
Kew Gardens (first visited 2009)
Kirkley Hall Zoological Gardens (first visited 2013)
Kielder Water Bird of Prey Centre (first visited 2012)
Kirkleatham Owl Centre (first visited 2015)
Lake District Wildlife Park (first visited 2015)
Lakeland Bird of Prey Centre (first visited 2015)
Lakeland Wildlife Oasis (first visited 2015)
Loch Lomond Bird of Prey Centre (first visited 2022)
Lotherton Bird Gardens (first visited 2018)
Libertys Raptor and Reptile Centre (first visited 2006)
Linton Zoo (first visited 2014)
Liverpool World Museum (first visited 2009)
Living Coasts (first visited 2013)
Manchester Museum Vivarium (first visited 2011)
Marwell Zoo (first visited 2013)
Monkey Haven (first visited 2013)
Monkey World (first visited 2021)
Newquay Zoo (first visited 2013)
North Anston Tropical House (first visited 2014)
Paignton Zoo (first visited 2013)
Paradise Park (first visited 2021)
Port Lympne Wild Animal Park (first visited 2013)
Reaseheath Zoo (first visited 2015)
Regent's Park Waterfowl Collection (first visited 2017)
Scottish Owl Centre (first visited 2015)
SEALIFE Blackpool (first visited 2015)
SEALIFE Loch Lomond (first visited 2022)
SEALIFE Manchester (first visited 2016)
SEALIFE Oban (first visited 1989)
SEALIFE Scarborough (first visited c.1992)
SEALIFE Weymouth (first visited 2021)
Shaldon Wildlife Trust (first visited 2013)
Shepreth Wildlife Park (first visited 2014)
Skye Serpentarium (first visited 1998)
South Lakes Wild Animal Park (first visited 2012)
The Deep (first visited 2017)
Thirsk Bird of Prey Centre (first visited 2015)
Thorp Perrow Arboretum (first visited 2013)
Tropical World Leeds (first visited 2013)
Tropiquaria (first visited 2021)
Twycross Zoo (first visited 2011)
Welsh Mountain Zoo (first visited 2012)
West Midland Safari Park (first visited 2015)
Wingham Wildlife Park (first visited 2017)
Wild Animal Adventures (first visited 2014)
Wild Discovery (first visited 2018)
Wild Place (first visited 2013)
Wildwood Trust (first visited 2017)
Woburn Safari Park (first visited 2013)
World Owl Trust Muncaster Castle (first visited 1990)
WWT Martin Mere (first visited 2013)
WWT Slimbridge (first visited 2013)
WWT Washington (first visited 2004)
Yorkshire Wildlife Park (first visited 2014)
ZSL London Zoo (first visited 2012)
ZSL Whipsnade Zoo (first visited 2013)