You could try Woodland (various campuses) which is all English and can be either 1/2 day or full day depending on what you want. Also Victoria is a bilingual (either Cantonese/English or Mandarin/English) kindergarten and they are all over the island as well. They are 1/2 day until the child is over 4, I believe. I have a child in each school and both are good.
http://www.woodlandschools.com/contact.php
http://www.victoria.edu.hk/
http://www.woodlandschools.com/contact.php
http://www.victoria.edu.hk/