Are you feeding it with something high nitrogen? If you feed it at all, use a balanced ericaceous feed (Miracle Gro make one called rhododendron and Azalea food).

siting is important ( not facing east as it doesn't like morning sun especially if frosty) also I understand you need to be sure its fed and watered in the summer as that is when it begins to make the buds

We neither feed nor water our Camellia and it is fine. I think Bamboo has probably hit the nail on the head.

mines in a large pot as my soil is alkaline so needs different care i suppose :0)

Yes Pamg it will need both feeding and watering preferably with rain water.

thats not a problem at the moment Mg, its been pouring all night again ;0(