I did my Adv. Open Water with
Dolphin Scuba Diving in Dec 05. Found out when I got there that it's owned by a couple of Brits. Everyone I met there were pretty nice. They can hire you all the gear too.
We dived Brussleton Jetty with them (as Jason says, a great dive! Lots of gish life, even saw a prawn and a little occie!
)
Sounds like they organise regular
trips. Might be worth contacting them to find out more.
Hope that helps,
Si