A survey conducted by training consultant DDI, who polled 600 managers, found that promotion causes as much stress as a divorce.

The survey also found up to half of surveyed managers were unable to cope with the extra work required to maintain their promoted position since they had risen from their junior position.

This Is London quotes DDI's managing director, Steve Newhall as saying, "It's a familiar story. You work really hard to get that promotion and you're excited about your new role."

"Then suddenly reality hits home: you are on your own, unsure of what is expected of you, missing aspects of your previous role that you had finally mastered, without your trusted network of colleagues, and politics rife amongst your new peer group whom you struggle to engage with," Newhall said.