Well, I'll try, here goes:
The writhed: there is not a nest box in their aviary at present, so they will not be breeding until they have one. The keepers are hoping that next year we may hear the flap of baby writheds!!
The wrinkled: The female was paired with the zoos previous breeding male. He died at over 20 years old, and their old aviary has been split into two halves. One houses the female, and the other houses the male. The male was donated from a private breeder after he realised that he would not be able to pair him with a female in his own collection. This pair will not be breeding until they have been sucessfully intergrated with one another, at the moment, they don't get on. The zoo has bred this species.
Hybrid taricitc: This pair will not breed again, but will not move to another zoo in the near future.
Visayan taricitc: Two of these pairs will be moving to avifauna, and two pairs will be staying at the zoo. The pair in the old st Lucia amazon parrot aviary are courting at the moment, and I've seen them offering food and investigating the nest box. Hopefully that pair will breed soon. The pair in the first BoP aviary have not been showing any reproductive behaviour while I was there, so no young there. The pair in the old salvadori's pheasant aviary have a nest box, but it is too small. The last pair , the one next to the congo peafowl, and in the old hybrid pair's avairy, do not have acess to their nest box.
The graet hornbills at Chester are not related to each other. The elephant house pair came from Avifauna, and the other pair should be breeding soon.
The rhinoceros hornbills will hopefully breed later this year, or early next.