Cherries are tip bearing Tony, I'm surprised you've got it trained as an espalier and not a fan, but if it works dont knock it. You should be able to tell now if the buds are flowers or leaves.
If the tree is the shape you want just a little summer pruning to reduce the growths on the side branches should be all that's needed. Don't go mad at it the first year as I have a feeling you'll be cutting off the next seasons fruiting wood. If you don't mind a reduced crop you can keep them short - just a few buds. I'm dong the same thing here on standard trees to keep the height down.
