edit:
Products I'm considering include the:
Boox note 2 +android 9 -not waterproof
Boyue likebook alita or note -cant find way to purchase to UK -not waterproof
Sony DPT-CP1/B (GBP499) -micro-usb -not waterproof -android 5, I think
Ruled out:
"reMarkable 2" -custom linux OS, can't see how it'd run a newspaper app.