I see someone mentioned Code South - I went to Brighton years ago on a date and loved what I heard on my car radio.
I used to listen to BBC Berkshire quite a bit when I lived in Reading as my neighbour was the breakfast show roving reporter.
These days it’s mostly podcasts, including lots of radio 4 ones. If on a long car journey it’s either Radio 2 or 5 Live, occasionally Classic, there’s also a Kiss FM soundalike (pirate I think) I can pick up in Exeter but not in the valley where I live, whose name I forget.
Problem with my ancient car radio is when radio stations change frequency by area, so often its easier to change radio station than try and retune it.