The BBC is currently experimenting with lossless Flac compressed broadcasts of Radio 3, i.e. CD Red Book quality. Thus far it will only work from a current Firefox browser:
For the actual stream: https://radio-3-concert-sound.pilots.bbcconnectedstudio.co.uk/
It does not seem to be geo blocked, so its full glory is also available to those outside the UK.
I particularly look forward to the live performances, given the often very good recording quality with great dynamic range.