They're far worse than a distraction, they enable everything from new forms of bullying to viewing of gore and porn.

Then there's the issue of kids having a high-value gadget that's easily damaged and at risk of theft in schools that never managed to solve old-fashioned bullying let alone whatever the kids get up to on social media these days.

If kids, or, anyone under-18 really, really needs a phone make calls, something like the original Nokia 3110 would be much more suitable than any smartphone.