I've got DAB in my car too, works fine with the stubby antenna on the roof, signal doesn't degrade to bubbling mud, it just cuts out.

I live in rural North Lancashire, bordering Cumbria, and the signal is OK most of the time.

During the summer it was perfect, I could listen to TMS in crystal clear digital audio, then when I did reach somewhere the DAB signal didn't I could just drop down to 198 Long Wave.

Yes indeed, the Boost radio in the MINI has DAB and Long Wave, I suspect there's a cricket fan on the MINI design team...