Here's a useful web site if you're wanting to know which UK music radio station(s) works best for your tastes, but note, it's focused more to the Pop scene than say Classical or Jazz: Compare My Radio.
They say: 'Compare My Radio tracks UK radio stations' "now playing" information and makes sense of it so you don't have to.'
You can have minutes of fun, comparing your favourite station against all comers, to see who plays more of your kinda music. NOTE TO MUSICIANS: If you have just released a single, you can easily see how many times it has been played, and by whom - and that's about the long and short of it. Interesting and useful (maybe) - thought I would share it with you.
Do comment if you know of other interesting music related sites, or have anything to say about this one.