Chris Coco with ambient, acoustic and chillout recordings.

JK and Joel count down the UK's top sellers and downloads.

Dave Pearce spins dance-floor discs.

In conjunction with the Open University, Radio 1 offers a CHOICE special four-week themed series on sex and relationships. This week's show examines the UK's unusually high incidence of sexually transmitted diseases, teen pregnancy, under-age sex and abortion. With Dr Mark Hamilton and Letitia before a live studio audience aged between 14 and 24 at Bar Pure in Sunderland. Listeners can phone [number removed] or, off air, [number removed].

Experimental DJs.

Miquita Oliver spins new tunes.