Peraino is referring to a new study conducted by the Center for Work-Life Policy that offers insights into why a very clear glass ceiling remains in the upper echelons of corporate America.

FORBES: Why So Many Top Women Don't Make It To Executive Leadership

Mrs May expects her new measures to cut non-EU student numbers by at least 70, 000-80, 000 a year, or more than a quarter of the non-EU total (EU citizens don't need visas to study in Britain), though both numbers and policy details remain a work in progress.

ECONOMIST: Student visas

According to a study of off-ramping professional women sponsored by The Center for Work-Life Policy (completed in 2005, updated in 2010, ) almost one third of professional women off-ramp at some point, often pulled by family considerations.

FORBES: Sourcing Talent Without 'Bankrupting' The Budget

Peter went on to lead several ornithological expeditions worldwide, popularised the study of wildfowl and wetlands through his television appearances, and his pioneering work in conservation also contributed greatly to the shift in policy of the International Whaling Commission and signing of the Antarctic Treaty.

BBC: Gloucestershire - Life and legacy of Sir Peter Scott