Cape Town International Airport has had to divert several flights while others were delayed due to a fibre network fault.

Airports Company SA says that this meant that the necessary instrument landing technology was unavailable to land planes in the heavy fog this morning. But by 10am, things improved, and flights were allowed to land.

Airlines like FlySafair and LIFT have noted that this kind of problem adds to their running costs, as in some cases, they must make three flights to achieve one.