Speed cameras no longer "beep"!

I have a TomTom One XL and until very recently it used to "beep" as I approached speed cameras.

Since the last update (I think) it no longer "beeps" ... it flashes a warning on the screen but there is no audio warning. I have sound switched on (it still announces each turning) it's just the speed cameras that are silent.

I've been Googling today and saw something along the lines of "since software update x.xx speed cameras are no longer POIs" which I'd spotted for myself.

Is there a setting somewhere I'm missing that will switch the "beeps" for speed cameras back on?

Thanks in advance