Depeche Mode have spoken to NME about what The Psychedelic Furs‘ Richard Butler brought to the writing of their upcoming album, ‘Memento Mori’.The synth-pop icons will this week release their long-awaited 15th album ‘Memento Mori’ – marking their first new material since the passing of founding member Andy Fletcher last year.Four of the album’s tracks – with a further two set to be released later this year – feature songwriting credits from Butler. Speaking to NME as part of a recent interview, the band’s chief songwriter Martin Gore explained the significance of this being a “big first” for him.“I’ve never written with anyone outside of the band in our history,” Gore told NME.