Original: Each week the theme of these shows change offering four hours of each genre once every 5 weeks in the same timeslot on BBC Radio 1 and BBC Radio 1Xtra. Every week this is followed by My Top 10 and 1Xtra's Best of the Week at 5am and 6am before daytime programs resume on BBC Radio 1 and BBC Radio 1Xtra.
Simplified: Radio 1 also has a sister station, BBC Radio 1Xtra.