I have a 7.5pp and no fancy audio or nav. I sometimes use Google Maps on Android Auto but this question is not about that, it is about the built-in satnav.
Now I understand that you can get live traffic if you link the built-in satnav to a data connection, but I have not done that. However today, coming back to Cheltenham from Bristol it told me in Bristol that there was congestion on the M5. How could it possibly know this?