At the heart of the problem is an assumption that senior jobs ‘naturally’ require long hours and constant availability, and so cannot be done flexibly or part-time. This is largely due to the 1950s pattern of men going out to work and women being at home to support them – enabling men to focus on work to the exclusion of everything else in life. And it has been exacerbated in many sectors by globalisation and always-on technology, which have extended the working day to 10 or 12 hours.