I'm with you. I heard the news flash announcement on Radio X. That's supposed to be a radio station for people into their indie music (even though they might be of a certain age ahem!), it's not Radio 2 territory.
Fine to break the schedule to announce it and give a breakdown of his life. Fine to play the national anthem. Fine to play some sombre music for the next hour.
But.....I've now heard the national anthem TWICE. They keep doing news bulletins JUST about this (people have smartphones and will already know about it and if they're interested they will have read more details). I have heard Imagine by John Lennon TWICE. Numerous Coldplay songs. 
I had to go somewhere in the car and so I chose to switch to the local radio station which plays crappy chart dancey stuff. And THEY were all sombre and playing sad music.
I mean, yes, it's sad, but it's not unexpected. I didn't mind the breakdown of his life etc but it's the constant repetition. It's like when you applaud someone in respect at a function. No-one wants to be the first to stop.
Please, just stop. We've been respectful. We don't all need to wear black and have a day of mourning.
It has just made me dread the day the queen dies, to be honest. The maudlin outpourings all over the media.....