In Denmark children have been in creches, from the end of their mothers' maternity leave, which in the 1970s was two weeks, kindergartens and after school clubs for the better part of three generations now.
However, now new mothers have a year's maternity leave, fathers have paternity leave AND we are seeing a move back to parents of young children working part-time, working from home, or in jobs were they can flex. Usually now, it is not any longer the mother who necessarily cuts back on working full-time. Parents either take it in turn, both work reduced hours, or the parent who earns less takes on child-care and housekeeping.
So probably much the same will happen in the UK too.
Whether it is good, bad or indifferent for small children to be out of their homes for nine-ten hours a day, depends on various factors:
How good the day-care is. Whether one or both parent really wants to look after small children. If children at home have play-mates (most don't, after Mummy's maternity leave ends and she no longer sees the other young mothers who had babies at the same time as she did)
It is not always better for children to be looked after in their homes, certainly not if the looking after is done by adults who would rather be doing anything else.