By Matt Hardy The departure of Natalie Robyn as chief executive of motorsport’s governing body the FIA after just 18 months has been described as a “shame” and “disappointing” by leading equality commentators in racing. Robyn became the first ever chief executive of the Federation Internationale de l’Automobile in November 2022, a move trumpeted by president Mohammed Ben Sulayem when he was accused of sexism. But only a year and a half later she has become the fourth high-level departure from the FIA in recent months, following sporting director Steve Nielsen, technical director Tim Goss and h…