thank you for your help, I will buy another one for sure. Going to have a look on the one you had mentioned.Yes. It’s the cheap and nasty charger. They are poorly made and generate RF which is picked up by the radio. I have experienced this myself and know first hand.
I have now bought a quality USB charger plug made my Anker. It has three outlets. I have my TomTom, my dashcam and my wireless mobile charging cradle in use at the same time. No issues with the output power or radio interference.