6-week breaks have been constructed from a bygone era that no longer works for families.
It works for teachers' families. And as professional people, teachers are extremely important to our country's infrastructure. They get a lousy enough deal - with reams of red-tape, diminishing respect for their work and a higher-than-average rate of sick leave - as it is. Teachers deserve to spend time with their families too. And they deserve sufficient time to prepare their year's classes, particularly considering all the box-ticking and differentiation this involves. They are saying they would leave if such a system were implemented. We should listen to them.
It works for blended families, enabling the children to spend valuable holiday time with both parents.
It works for families who have difficulty taking time off in October or February, who can't necessarily afford to jet off to the sun for a week at those times of year, and who don't want two weeks' sitting around in their pyjamas when it's dark and wet/dull outside.
For any family who does care to take holidays, the window of availability will narrow and prices would likely rocket. This doubtless means that fewer of them will be able to take that opportunity. This is a lose-lose situation for everybody.
As to my own circumstances, as a university lecturer I can't take time off at these times (school holidays rarely tally as it is except in summer, as we work in semesters not terms), and would end up having to shove my kid in childcare for all but two days of those October/February weeks. Summer is my compensation for a rigid lack of flexibility the rest of the year. My child has settled into state primary education well and is thriving there, but if the summer break were to be shortened and other holidays elongated, our family time would suffer. In these circumstances - and I appreciate that we're privileged - despite my reservations about public school I would seriously consider moving him there.
This isn't a missive that poor families are poor 'because it's their own fault', or a dismissal of their situation because 'I'm alright, Jack'. Poverty/austerity is a huge problem in the UK and needs tackling urgently. I'd support any sincere measures to do exactly this. But I'm at a loss to see how changing the academic year will achieve it. It's tackling the symptom, not the underlying cause. And any government who attempted this I'd suggest would be guilty of a cop-out of some magnitude.