This may have been posted already, but definition from wikipedia (quickest - there are plenty other sources):
"The glass cliff is a term that describes the phenomenon of women in leadership roles, such as executives in the corporate world and women political election candidates, being likelier than men to be put in leadership roles during periods of crisis or downturn, when the chance of failure is highest."
Sound familiar? God help them, whoever becomes PM. I was just fascinated that this was happening right in front of our eyes.