Different days off and more teachers than we have currently. The same people who view 5 day work weeks as an imposition as workers should be doing 6 or even 7 day weeks for the same pay as 5, view state schools as subsidised babysitting for their workers kids so schools would need to stay as 5 days rather than drop to 4
UK majority of the bank holidays are on a Monday, so Fridays would be nice as otherwise you’d lose them and what would become long weekends now.
UK we are seeing a very slow shift to 4 day weeks for more privileged jobs, I work with two people who both have Fridays off as it’s an actual thing you can apply for at my employer.
While the Tories stopped councils from offering 4 day weeks to employees, it’s got to be coming back, further spreading its availability.