There is no mandatory entry clearance (visa) requirement for South African nationals wishing to come to the United Kingdom as visitors. However, there is provision for prospective visitors to apply for an optional entry clearance (visa) at the nearest British Diplomatic Post if they are in any doubt whether they will qualify for entry. Possession of an entry clearance does not guarantee admission, but it does provide a measure of likely eligibility prior to travel, and affords a right of appeal before removal in the event that entry is refused.
A prospective visitor must satisfy the Immigration Officer amongst other things that he or she is genuinely seeking entry only for the period and purpose stated, and will be maintained and accommodated without recourse to public funds or taking employment. If the Immigration Officer is not satisfied, entry may be refused after reference to a Chief Immigration Officer or Immigration Inspector. It should be emphasised that entry to the United Kingdom is not simply a formality if a prospective visitor is in possession of a passport, return ticket and adequate funds. The onus rather is on the person seeking entry to satisfy the immigration officer as to his or her intentions.
Decisions to refuse entry cannot be appealed and can result in considerable inconvenience and distress. South African travellers refused entry into the UK may be required to return to South Africa. There is also a risk that other countries may also refuse admission on the basis of the British government's decision, which in all cases is recorded in the traveller's passport.