Launch Apple Music radio station directly from command line
You don't need AppleScript - can do it from the commandline directly with the right URI.

open "itmss://itunes.apple.com/us/station/listen-in-apple-music/idra.985499994?cmd=AddStation"


You're calling itmss:// because you need to hit iTunes itself.

Then, replace the code into the idra.XXXXXXXXX bit. I'm in the USA, so it's /us/station, but I suspect /gb/station would work for you, if you're in the UK.

FYI - you can actually just cmd-space and and paste just the URL into Spotlight to have it run it and open the station in iTunes directly.