Thanks for the quick replies. In answer to a question about Garmin, I have the mid-range SR model that comes without its own navigation system hence me using Google Maps and Waze on Android Auto. I now note that this is a known issue which I have also found worse on Waze than Google Maps. I don't get anything on the driver's screen when using Apple Car Play but I believe this might be a fault or i-phone connectivity issue that I am hoping will be addressed later this week by the dealer.