Radio 1 provides alternative genres at night, including electronica, dance, hip hop, and indie, whilst it's sister station 1Xtra plays Black contemporary music, including hip hop and R&B.
The choice of music and presenting style is entirely that of program hosts; however, those who present in the daytime have to rotate a number of songs a specific number of times (8, 13, or 15) per week. It was launched in 1967 to meet the demand for music generated by pirate radio stations when the average age of the UK population was 27.
The BBC claim that they target the 15–29 age group, and the average age of its UK audience since 2009 is 30. BBC Radio 1 started 24-hour broadcasting on 1 May 1991. It is the third most popular station in the United Kingdom after Radios 4 and 2.