In the early 2000s, a generation of young South Africans left home. Fresh out of university, passports in hand, they were chasing something most could not quite name. Adventure. Freedom. The thrill of landing in a city where nobody knew them and anything felt possible. London in particular had a gravitational pull. The working holiday visa was a rite of passage. You did your degree, you packed a bag, and you got on a plane. Yes, there were harde…