I've not noticed that they make any kind of obvious decision, though of course they do have the odd programme that is supposed to be soothing much like other broadcasters do.
If you listen to the online or freeview feeds I often find that the dynamic range is better than on fm too. Other so called classical stations do odd things, namely R3. Jazz and weird improvised or electronic tuneless music is often around late in the night as well.
Also ofcourse the definition of Classic seems to have become anything with an orchestra that sounds rather big and is not James Last type. I do happen to think that some of his arrangements of classical pieces were very good though and it seems churlish to allow stuff like film scores and not play his pieces as he might shock horror use an electric instrument in some classics.
Music to me, is music. I tend to make no distinction really. There is the bubble gum pop kind we get on the radio , and there is the older or middle of the road stuff, and lots of there types, so I guess drawing the line is getting harder if that is what you want to do.
Brian