OK, so, after having an engineer come out and say that my issue appears to be the router (Smart Hub type A) I ordered a replacement and was sent a seemingly identicaltype A.
I have swapped them today and all appeared fine, I'm using a BT Whole Home 3 disc set too so I turned the WiFi off on the new router - same set up as before all connected up faultlessly, but I did a general restart of the discs anyway.
Issue is - after much messing about!! Disney app, BBC news app, Prime music and a number of other apps will not work through the new router, if I swap the old router back in, the apps work. I have fire TV sticks and mobiles, and all are showing the same issue. Only difference is the router.
Can anyone suggest what could cause this?
have you turned of smart setup
https://www.bt.com/help/broadband/what-is-smart-setup-on-the-bt-hub--how-can-i-turn-it-on-and-off