Soft Cell have released a new track which will feature on their upcoming retrospective box set, Keychains & Snowstorms: The Soft Cell Story. You can hear 'Northern Lights' above.

The track is one of a handful of new and previously unreleased songs which will feature on the box set, which the duo are due to release next month. In all, the box set encompasses 10 discs across CDs and DVDs.

"To me, this box set is like a modular synthesiser of our collective influences and experiences, all patched into a dangerously overloaded plugboard," says Dave Ball of the release which will mark the pair's 40th anniversary.

The box set covers both phases of the pair's career together from 1978-1984 and onto their 2001-3 reunion. It takes in over 130 tracks and over 12 hours of music, and has been put together with the curation of Almond and Ball themselves.

Featured are newly-remastered full 12" versions of all the Soft Cell singles and B sides as well as a clutch of previously unreleased material, much of which was only available before on bootlegs or has been created especially for the anthology release.

The release also features a previously unheard full-length live concert recorded in September 1983 in Los Angeles, while there are further live cuts from the duo's farewell shows in London in January of 1984 as well as from their reunion gigs in 2002 and 2003.

Keychains & Snowstorms: The Soft Cell Story is set for release on September 7 and you can find all the details here. The duo will play their final live show at London's O2 on September 30 for which remaining tickets can be purchased here.