Thats weird, I just just said;
Alexa open myTuner.
Play Atlantis - of three options (2 with FM in name) I chose 1 and it plays, with Atlantis logo.
BUT when checking the website stream it's different music! Same issue with Radio.UK app.
I recall I deleated myTuner app for that reason many months ago as although bringing up the correct logo, it is wrong station.
I use V Radio, internetradiouk.com, radio.net and Online radio Box apps when on the move.
If you've Sonos you can 'add station' and use this; http:/uksoutha.streamimg.broadcast.radio:18420/boss-atlantis.m3u
Give it a name, save, the you can find it in tuneIn My Radio Stations. i then added it to Sonos favourites.
I guess you can this address to other systems that have tuneIn as a Service.
Good luck, just listening to Peter Quinn on brekkie!