If it's so bad here, by all means, please leave. There are too many people in London anyway.
Next Month! 
I was living mainly in Johannesburg, but spent time down around Cape Town too.
Crime is in no way limited to townships. I know of someone who had their wallet taken at gunpoint and someone else who had their window smashed/ handbag stolen whilst they were in the car, both in Sandton. When I was there, there was also a shooting at the Melrose Arch Hotel (Near the Wanderers cricket stadium in Jo'burg) (Which I sometimes stayed in, and often used to dine in the restaurants in the complex), and my colleague's next door neighbour had her house burgled whilst she was held at gunpoint (Also near the Melrose Arch).
Didn't say it was limited to the townships, i said mostly. Obviously there is crime outside of the townships which is higher than average but those massive crime rates you see are influenced mostly by crime and gang activity in the township areas.
My experience of the weather in Cape Town was that it was like a moderately warmer version of here. Still cloudy/ windy a lot, but overall a bit warmer. The weather in Gauteng is excellent though.
Yup, Gauteng weather is nice, love those thunderstorms!
And I agree with the Cape being windy/cloudy but compared to the UK...
The beaches are nice, but the sea around the Cape is FREEZING!!! Unless you are going up to Durban or somewhere else north, forget going in the actual sea!
Spot on, the Atlantic is amazingly cold. Durbz is nice though although it can get very humid. Although you don't have to swim when at the beach, just enjoy the location.
Yes property is cheap, but wages are also very low, and as you state, employment is difficult. I also really hate the 'walled garden' that is certainly necessary.
Walled garden, different opinions I guess. I tend to like my privacy while hanging out by the pool
Traffic is bad in Gauteng especially as there is no public transport to speak of really, and yes it's less severe around Cape Town (But I wouldn't call it 'good'), but you pretty much have to drive anyway. Luckily motoring isn't that expensive.
Was more comparing the traffic to the traffic of London. Public transport is being developed though, Gauting now has the Rea Vaya BRT and Gautrain. Cape has the IRT system.
The people- Not really had any problems either here, nor there, but there is clearly a big problem between the blacks and the whites in ZA and that cannot be denied.
You're right about the racial issues, people however are generally friendly in SA
"but stuff is cheap here anyway"... By "stuff" you mean essentials. Any luxuries are certainly not cheaper than the UK. (Be it electronics, clothes, cars), and with wages what they are, makes them very expensive for the local working population.
Spot on there, essentials are what I meant. Houses, food, electricity, tax etc.. all very cheap. Technology can be double the price of that in the UK/US. Cars are expensive