A complete English translation of the Catechism of the UGCC is available here on royaldoors.net, an excellent site on its own and now with even more great stuff...
The Catechism Christ our Pascha – audiobook (in Ukrainian) - https://youtu.be/4YcvOKOLdXM
The Catechism Christ our Pascha (in Ukrainian) -http://catechismugcc.org
The Catechism Christ our Pascha (in English) - http://catechism.royaldoors.net/