The short-term visa for the UK is called the Standard Visitor Visa, and it is valid for up to six months. It is important to select the correct visa category because this will determine the documents which need to be submitted when applying for the visa.
The types of Standard Visitor Visas available for South Africans are:
The Standard Visitor Visa is also available for a longer term, for travelers who plan to visit the UK regularly. This visa is valid for 2, 5 or 10 years, but you can stay in the UK for a maximum of 6 months on each visit.
You must visit the UK Government website at www.gov.uk/browse/visas-immigration to apply for a visa. The earliest you can apply is 3 months before you travel.