Cape Town is 2 hours ahead of London (GMT), and 1 hour ahead during BST. London observes DST. Cape Town uses SAST (UTC+2) year-round.
When it's 12:00 PM in London, it's 2:00 PM (GMT) or 1:00 PM (BST) in Cape Town.
Most hours work! With only a 1-2 hour difference, business hours overlap almost entirely.
British Airways, Virgin Atlantic, and South African Airways operate direct flights between London and Cape Town taking about 11 hours.