I would guess that most of our generation had a significant career break after becoming a Mum - staying at home till the youngest was at kindergarten then working part-time until the children were into their teens. That was the norm, but it did make it quite difficult to re-establish a career in your forties, fifties and sixties.
However many more of our daughters took much less time off when they had their children, partly because they were generally older than we were, but mostly because of social pressure. Economic pressures play a part but most of us went from two people on two incomes to three or four on one income and somehow managed.
I think another factor is age discrimination. Young women think they will never get another decent job if they try to re-enter the jobs market when they're over forty. Age discrimination (overt or covert) should be illegal as the country needs the skills of mature men and women.
Smart Meters. Am I being over-charged?
To think that London, or anywhere else for that matter, does not belong to any one demographic