Britain will offer work visas to graduates from the world’s best universities in an expansion of its post-Brexit immigration system that is designed to attract the “best and brightest” workers. But no African universities are included in the list of eligible institutions.Britain will offer work visas to graduates from the world’s best universities in an expansion of its post-Brexit immigration system that is designed to attract the “best and brightest” workers. But no African universities are included in the list of eligible institutions.