I've seen the following...also listed is the first time I recall seeing it.
- Kowari (Marwell)
- Tiger Quoll (Hamerton)
- Eastern Quoll (Linton)
- New Guinea Ground Cuscus (Cotswold Wildlife Park)
- Common Brushtail Possum (Hamerton)
- Common Ringtail Possum (Hamerton)
- Leadbeater's Possum (London)
- Sugar Glider (Thrigby)
- Feather-Tailed Glider (Colchester)
- Southern Hairy-Nosed Wombat (Longleat)
- Common Wombat (Hamerton)
- Koala (Duisburg)
- Woylie (Duisburg)
- Long-Nosed Potoroo (Hamerton)
- Goodfellow's Tree Kangaroo (Duisburg)
- Matschie's Tree Kangaroo (Koln)
- Western Grey Kangaroo (Marwell)
- Parma Wallaby (Linton)
- Red-Necked Wallaby (Banham)
- Common Wallaroo (Linton)
- Red Kangaroo (Banham)
- Yellow-Footed Rock Wallaby (Flamingoland)
- Swamp Wallaby (Flamingoland)