This is an update to my recent post on this topic.
This page shows how to create a simple radio command to play and stop different BBC radio stations on a Raspberry Pi. Once set up, you can just type e.g. radio BBC4 to get your favourite station playing. This is useful for various reasons, for instance if you have a room with just an amplifier and speakers in then, with a Raspberry Pi, you can listen to the radio (and with other software your music collection). You can also listen to BBC 6 Music which you cannot get on FM.