Hi Kay. Sorry it's taken so long for me to respond to your question, but I've been on holiday.
I'm afraid that, with the demise of the English Educational Centre, based on the Golf del Sur, there isn't really anywhere else in the south of the island that could be considered a British school.
There are some other British schools, but, if you've read my "education" page, you'll see that they're up in the north.
You may have to consider something like home schooling.