In theory „There's no (state) school giving out tablets that aren't pretty much single-use locked down devices.“

In practice, most schools lack anyone with enough technical literacy to lock down the device. So they just hand out unlocked cheap android tablets with all the stock spyware and advertisement pre-installed.

They don't "hand out" anything really - probably the closest thing is government programmes to fund laptops/tablets for low income families, but not a single school locally "gives out" tablets to kids. But they're all just "normal retail" devices.

They have some things used in lessons, but they're all given out at the beginning of the lesson, then gathered at the end.

You could argue that it's a problem they they assume home access to such things anyway - especially in later years - as things like online 'homework' is the norm.