The government have decided to mandate a minimum 32.5 hour week for schools - the equivalent of being open from 8:45 to 3:15
This is not a specified teaching time, but opening time. Schools who are under will have to find ways to tack extra time onto the teaching day, perhaps by making lunchtime longer or adding an extra break. A school that has, for example, 20 minutes form time, 5 hours of lessons, 20 minutes of break and 40 minutes of lunch is not open long enough. One that has the same arrangement but 50 minutes lunch is fine.
Why? Fuck knows. What they have once again completely failed to do is consult schools about why their opening hours are as they are. Schools in my area, for example, have finely co-ordinated finishing times to avoid massive congestion. Schools who are under would have to consider opening earlier which will mess up buses, and screw those with childcare commitments. It's going to be logistically challenging to arrange, but of course, it won't be the DfE doing it.
schoolsweek.co.uk/schools-asked-to-offer-32-5-hour-week-by-2023-and-ofsted-will-check/