Schooling in Jo'burg (Johannesburg)

Hi, may be moving to Jo'burg this year. I have an 11 year daughter and looking for good schools. Currently living in Hong Kong, she attends a British school so learning the English National Curriculum. Cannot find equivalent in Jo'burg. There are American, German, French and the local independent schools BUT NO BRITISH SCHOOLS. We may move to the UK in a couple of years time so need to think about and plan for year 9 entry Protected content . The local independent schools look quite impressive - but I'm worried about curriculum differences.

Also, is there tuition for English Keystage 3 readily available in Jo'burg?

Any information/advice will be greatly appreciated.

Thx