No phone chargers in the cab, but you can buy powerbanks on Amazon which you can connect to a phone to charge it whilst on the move, the proviso as previously stated is that the phone is turned off.
I do know some folk who use "Aircraft Mode" on a smartphone which disconnects the phone from the mobile network, so it can't receive calls etc instead of being off, which is fine if you want to waste your battery!
SW are to shortly introduce C-DAS, the latest version of DAS, it will apparently be connected to (hence the C), NR's TMS & will have the drivers details on it when it boots up, you just configure it to train length and you can add or remove stops on it and all sorts of things, even TSRs, ESRs, plus loads of stuff which I've already forgotten and best of you can even blank it out if you don't want it.
Many drivers see it as a spy in the cab and have said "It'll be blank" & "Don't want it on" and I concur with that wholeheartedly. I just see it as a distraction. So it will be blank with me too!
We're also meant to be getting an iPad or Android tablet and they can shove that too, as they'll have tracking devices in them, just as the normal iPad & Android devices do and I won't have that because of the fear that you comply with all electronic devices off in the cab, you put it in your bag and en-route the bag falls over or gets knocked and it gets knocked on, the management then know that the tablet is on in the cab and whilst the train is moving so they'll just come along and sack you. So NO TABLET either.