Thanks again for the quick responses, I think I will go with Island Divers on Phi Phi as I it's on the West coast and I can get Open Water course including everything for 10,320 Baht which seems pretty good for the island and it is a maximum of 4 in a group. I'm getting International Backpacker Discount Card that has quite a few dive centres in Thailand on there giving some good discounts, if anyone else wouldn't mind having a look on there to see if there are any other better dive centres that would be great. There are quite a few in Phuket, so maybe there would be better?