Unfortunately only in MP3 via My Live Radio, in Flac direct to for example the Kef LS50WII
You sure it’s Flac, just read a review and it seems it only plays Flac to certain devices known to them that support Flac radio streams which includes their own products that use linkplay tech and not Kefs speakers as the stream unlimited boards used in them don’t support Flac radio streams.
A real pity the so called “secondary stream” is only mp3. Even 16/44 lossless would be a good thing here, but 24/48 would be fabulous!
Apparently it’s for compatibility reasons as not all UPnP renderers support flac streaming as internet radio url which is how it works as it sends a live stream.
Just purchased the Hifi Rose RS520, “problem” solved 