Camellias rarely need pruning other than to remove dead or damaged wood and general tidying up.

If required this should be done after flowering!

http://www.thegardenersalmanac.co.uk/Data/Camellia/Camellia.htm

I agree with Teegee above.Just thinking of trimming my one that runs out of bloom first, then the rest. You just shape them really. However, if a mature one has gone into a very undesirable shape or height you can cut it back drastically. Feed the shrub and fuss it a bit more and make sure they have water in July/August, and a reshaped one will recover. My brother did a hatchet job on his Camellia by the front door and it is back blooming better then ever.

Thank you both, you have been very helpfull i will give it a go .

Teegee. i have looked at the link you sent me and book marked it so i can refer to it when the time come's to cut it once again thank you :)