We visit SA once a year...
I'm curious to know the things you notice (good and bad) about South Africa on these visits. Things that have changed and/or things that didn't but are more obvious now that you've lived elsewhere for so long?
Strangely enough I don't meet any "new to London" South Africans any more and most that I do meet are planning to return to SA in the near future. It might just be the circles I'm moving in at the moment but I get the general idea that most do want to move back.
That might have something to do with the working holiday visas being no more. But that doesn't mean people aren't still coming over - we just employed a fresh arrival. You should ask yourself why you're looking for other South Africans as friends (and by proxy, why you're here in the first place?). If you have difficulty befriending non-South Africans and having a social life without South Africans around you, then you're definitely in the wrong place.
When I came over it was to travel - never planned to stay longer than a year - and I deliberately avoided South Africans as far as I could, because I wanted to get to know other cultures. I still do, but for other reasons. That said, I have a few South African friends here whom I know from before I and they came over respectively, and through them I've met a few more. But all of us are pretty well adjusted, all of us have many English friends, all of us are married to/engaged to/dating English people, and we don't spend any more time talking about South Africa than we need to. There is nothing worse than to have to listen to someone harp on about their old country, weather they're singing its praises or slagging it off.
And that is why I avoid South Africans here. Because 9 out of every 10 I meet, can't have a conversation without drifting into either of the following, all delivered with a healthy dose of hyperbole:
1. What a paradise South Africa is. (How perfect the weather is, how friendly the people are, how cheap everything is)
2. What a terrible place South Africa is. (How dangerous it is, how terrible the crime is, how it's going to become another Zim, etc)
3. What a terrible place England is. (terrible weather, terrible food, expensive, blah blah blah)
Whatever their reasons are, I don't want to my head to be filled with their nonsense. They're the people I wouldn't be friends with in South Africa anyway.
Anyway, just my opinion.