Platform B serves Brighton and Hove. It is an Ofcom-licensed community station, and this is what it publishes about taking music from artists.
Status
Closed
How they take music
See sheet
What they ask for
Contact page states: "PLEASE NOTE - we are currently not taking any music submissions from artists or radio pluggers." The page adds that programming decisions rest with individual DJs and that artists should watch the station's website and social media to work out which DJ might take their music.
The exact submission address or form is on your sheet, not on this page. That is deliberate: a station that publishes an address for artists should not have it republished where it can be harvested.
Rotation's free sheet is U.S. radio: 1363 stations, none of which has a rule about what country you are in. A UK artist can use it as it stands.