I’m afraid I haven’t seen any of these in the UK yet, but thanks to some very helpful comments here is the complete list.
Thanks to John Kaylor and Audrey M. here is the complete list for Series 5.
A – Spawning Zombie Pigman B – Attacking Ghast C – Steve? with Mix Matched Armor D – Iron Golem with Flower E – Killer Rabbit F – Alex with boat G – Chicken Zombie (Jockey) H – Teleporting Enderman I – Donkey with Chests J – Siamese Cat K – Wolf with Bone L – Skeleton in Flames
As soon as I get my hands on one, I’ll update this post for images etc..