John Not.responding.@dotcom wrote:
I have tried plugging the DashCam into the cars own (5v) USB Ports and I
get the break up of DAB again. Perhaps it is the cable that is radiating
something

Try a USB cable with a ferrite on it:
https://www.ebay.co.uk/itm/CLEAR-USB...R/263149489114
(or whatever connector the dashcam has)

THeo