Is there some kind of parental software that can lock down phones like what happens on corporate phones? Like where you can control which apps are installed etc? That sounds like the best approach: just give them a phone with WhatsApp, phone and SMS. Any refurbished phone from the last 10 years would work for that (lack of Android security updates might be an issue though)
It’s good they’re giving the EA some extra funding and powers, but we really need to nationalise this. Water privatisation has been a disaster, and the longer we keep it going the more money they’ll be able to syphon out.