Seems to have happened very recently out here near Lincoln. What's yours like, have you got extra "burbling" or is it just our area perhaps?
Had same problem in Donny for a couple of days and pretty much unlistenable driving back from Leeds yesterday.
It's pretty good in the room I work in at home but it's patchy to say the best as soon as I get in the car and travel anywhere.
I had problems with Radio 6 music kept cutting out both in car and at home, did a quick reset of channels and no problems now, hopefully!