Open communication and cutting edge technology.
Management, if you look at reviews from 6 years ago to now you'll see that everyone dislikes the management. Nothing has changed. So it's worth having a turnover of 20+ each year in the London office alone just to keep a toxic senior staff team?
It's extremely difficult for a woman to get promoted or find a spot on the leadership team. Raising your hand or "leaning in" bears no fruit. Promotions seem to come to those who are willing to remain in the same position for 5 - 10 years.