Importing a car from South Africa under 10 years old is tricky. Your car will need an IVA Test. You must prove that you have lived in South Africa for at least 12 months. You must also show that you have owned and insured the car for at least 6 months. As your car is right-hand drive the authorities here make it very difficult in order to protect the UK car market. Tick these boxes and you will get your IVA Test.
Your car will need necessary modifications to pass the IVA test. Mainly conversion of speedometer to MPH and the addition of rear fog light.
If your car is over 10 years old it will need the above modifications but just an MOT test pass for UK registration.
Prior to shipping your car to the UK you will need to obtain police clearance for the export to take place and a Microdot certificate obtained. A local shipping agent will assist you with this.
All imports from South Africa will be subject to import duties and taxes. Unless of course you have owned the vehicle for 6 months and lived in South Africa at least 12 months.
The main ports out of South Africa for containerized and RoRo car shipping are Durban and Capetown.