BBC National Radio Channels (UK only)
Looking on Tunein.com for e.g Radio 1 you get 4 options:
http://tunein.com/radio/BBC-Radio-1-England-988-s24939/
WMA 48k, AAC 128k, 56k, 48k
If you get the URL details out of the link you can feed the AAC url's into Serviio as a 'web resource'. For example Radio one AAC 128k url is:
http://bbcmedia.ic.llnwd.net/stream/bbc ... 231cc9c2bf
I found it easier to get the links from this page in the end rather than tunein.com
http://www.listenlive.eu/uk.html