Hopefully someone will come along with a more detailed and authoritive answer as I've only been once, as pax...
We landed on the northerly runway. Appeared to join downwind, overflying the western end of the island north-south, before turning left base flying roughly parallel to the south coast. Left turn to final from, at a wild guess, 8nm out. But I'm only a Cessna driver and not used to such wide circuits!